diff --git a/java/src/com/android/inputmethod/latin/BinaryDictionary.java b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
index 1e31c96ec..8a6404b1b 100644
--- a/java/src/com/android/inputmethod/latin/BinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
@@ -113,11 +113,8 @@ public final class BinaryDictionary extends Dictionary {
         synchronized(mDicTraverseSessions) {
             DicTraverseSession traverseSession = mDicTraverseSessions.get(traverseSessionId);
             if (traverseSession == null) {
-                traverseSession = mDicTraverseSessions.get(traverseSessionId);
-                if (traverseSession == null) {
-                    traverseSession = new DicTraverseSession(mLocale, mNativeDict, mDictSize);
-                    mDicTraverseSessions.put(traverseSessionId, traverseSession);
-                }
+                traverseSession = new DicTraverseSession(mLocale, mNativeDict, mDictSize);
+                mDicTraverseSessions.put(traverseSessionId, traverseSession);
             }
             return traverseSession;
         }
@@ -266,18 +263,8 @@ public final class BinaryDictionary extends Dictionary {
                 new FormatSpec.FormatOptions(outFormatVersion[0], hasHistoricalInfo));
     }
 
-
     @Override
     public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
-            final String prevWord, final ProximityInfo proximityInfo,
-            final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
-        return getSuggestionsWithSessionId(composer, prevWord, proximityInfo, blockOffensiveWords,
-                additionalFeaturesOptions, 0 /* sessionId */, inOutLanguageWeight);
-    }
-
-    @Override
-    public ArrayList<SuggestedWordInfo> getSuggestionsWithSessionId(final WordComposer composer,
             final String prevWord, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
             final int sessionId, final float[] inOutLanguageWeight) {
diff --git a/java/src/com/android/inputmethod/latin/Dictionary.java b/java/src/com/android/inputmethod/latin/Dictionary.java
index cd380db6b..5253cc3dd 100644
--- a/java/src/com/android/inputmethod/latin/Dictionary.java
+++ b/java/src/com/android/inputmethod/latin/Dictionary.java
@@ -73,6 +73,7 @@ public abstract class Dictionary {
      * @param proximityInfo the object for key proximity. May be ignored by some implementations.
      * @param blockOffensiveWords whether to block potentially offensive words
      * @param additionalFeaturesOptions options about additional features used for the suggestion.
+     * @param sessionId the session id.
      * @param inOutLanguageWeight the language weight used for generating suggestions.
      * inOutLanguageWeight is a float array that has only one element. This can be updated when the
      * different language weight is used.
@@ -83,17 +84,7 @@ public abstract class Dictionary {
     abstract public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
             final String prevWord, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight);
-
-    // The default implementation of this method ignores sessionId.
-    // Subclasses that want to use sessionId need to override this method.
-    public ArrayList<SuggestedWordInfo> getSuggestionsWithSessionId(final WordComposer composer,
-            final String prevWord, final ProximityInfo proximityInfo,
-            final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final int sessionId, final float[] inOutLanguageWeight) {
-        return getSuggestions(composer, prevWord, proximityInfo, blockOffensiveWords,
-                additionalFeaturesOptions, inOutLanguageWeight);
-    }
+            final int sessionId, final float[] inOutLanguageWeight);
 
     /**
      * Checks if the given word occurs in the dictionary
@@ -167,7 +158,7 @@ public abstract class Dictionary {
         public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
                 final String prevWord, final ProximityInfo proximityInfo,
                 final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-                final float[] inOutLanguageWeight) {
+                final int sessionId, final float[] inOutLanguageWeight) {
             return null;
         }
 
diff --git a/java/src/com/android/inputmethod/latin/DictionaryCollection.java b/java/src/com/android/inputmethod/latin/DictionaryCollection.java
index 16173fffc..239fd067a 100644
--- a/java/src/com/android/inputmethod/latin/DictionaryCollection.java
+++ b/java/src/com/android/inputmethod/latin/DictionaryCollection.java
@@ -59,20 +59,20 @@ public final class DictionaryCollection extends Dictionary {
     public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
             final String prevWord, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
+            final int sessionId, final float[] inOutLanguageWeight) {
         final CopyOnWriteArrayList<Dictionary> dictionaries = mDictionaries;
         if (dictionaries.isEmpty()) return null;
         // To avoid creating unnecessary objects, we get the list out of the first
         // dictionary and add the rest to it if not null, hence the get(0)
         ArrayList<SuggestedWordInfo> suggestions = dictionaries.get(0).getSuggestions(composer,
                 prevWord, proximityInfo, blockOffensiveWords, additionalFeaturesOptions,
-                inOutLanguageWeight);
+                sessionId, inOutLanguageWeight);
         if (null == suggestions) suggestions = CollectionUtils.newArrayList();
         final int length = dictionaries.size();
         for (int i = 1; i < length; ++ i) {
             final ArrayList<SuggestedWordInfo> sugg = dictionaries.get(i).getSuggestions(composer,
                     prevWord, proximityInfo, blockOffensiveWords, additionalFeaturesOptions,
-                    inOutLanguageWeight);
+                    sessionId, inOutLanguageWeight);
             if (null != sugg) suggestions.addAll(sugg);
         }
         return suggestions;
diff --git a/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java b/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java
index e0220e137..ddbb196d9 100644
--- a/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java
+++ b/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java
@@ -455,7 +455,7 @@ public class DictionaryFacilitatorForSuggest {
             final Dictionary dictionary = dictionaries.getDict(dictType);
             if (null == dictionary) continue;
             final ArrayList<SuggestedWordInfo> dictionarySuggestions =
-                    dictionary.getSuggestionsWithSessionId(composer, prevWord, proximityInfo,
+                    dictionary.getSuggestions(composer, prevWord, proximityInfo,
                             blockOffensiveWords, additionalFeaturesOptions, sessionId,
                             languageWeight);
             if (null == dictionarySuggestions) continue;
diff --git a/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java b/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
index e323f0ab2..4358f84c2 100644
--- a/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
@@ -366,7 +366,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
     }
 
     @Override
-    public ArrayList<SuggestedWordInfo> getSuggestionsWithSessionId(final WordComposer composer,
+    public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
             final String prevWord, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
             final int sessionId, final float[] inOutLanguageWeight) {
@@ -380,9 +380,9 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
                     return null;
                 }
                 final ArrayList<SuggestedWordInfo> suggestions =
-                        mBinaryDictionary.getSuggestionsWithSessionId(composer, prevWord,
-                                proximityInfo, blockOffensiveWords, additionalFeaturesOptions,
-                                sessionId, inOutLanguageWeight);
+                        mBinaryDictionary.getSuggestions(composer, prevWord, proximityInfo,
+                                blockOffensiveWords, additionalFeaturesOptions, sessionId,
+                                inOutLanguageWeight);
                 if (mBinaryDictionary.isCorrupted()) {
                     Log.i(TAG, "Dictionary (" + mDictName +") is corrupted. "
                             + "Remove and regenerate it.");
@@ -400,15 +400,6 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
         return null;
     }
 
-    @Override
-    public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
-            final String prevWord, final ProximityInfo proximityInfo,
-            final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
-        return getSuggestionsWithSessionId(composer, prevWord, proximityInfo, blockOffensiveWords,
-                additionalFeaturesOptions, 0 /* sessionId */, inOutLanguageWeight);
-    }
-
     @Override
     public boolean isValidWord(final String word) {
         reloadDictionaryIfRequired();
diff --git a/java/src/com/android/inputmethod/latin/ReadOnlyBinaryDictionary.java b/java/src/com/android/inputmethod/latin/ReadOnlyBinaryDictionary.java
index 9f61d6c37..15b12381b 100644
--- a/java/src/com/android/inputmethod/latin/ReadOnlyBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/ReadOnlyBinaryDictionary.java
@@ -50,22 +50,14 @@ public final class ReadOnlyBinaryDictionary extends Dictionary {
 
     @Override
     public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
-            final String prevWord, final ProximityInfo proximityInfo,
-            final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
-        return getSuggestionsWithSessionId(composer, prevWord, proximityInfo, blockOffensiveWords,
-                additionalFeaturesOptions, 0 /* sessionId */, inOutLanguageWeight);
-    }
-
-    @Override
-    public ArrayList<SuggestedWordInfo> getSuggestionsWithSessionId(final WordComposer composer,
             final String prevWord, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
             final int sessionId, final float[] inOutLanguageWeight) {
         if (mLock.readLock().tryLock()) {
             try {
                 return mBinaryDictionary.getSuggestions(composer, prevWord, proximityInfo,
-                        blockOffensiveWords, additionalFeaturesOptions, inOutLanguageWeight);
+                        blockOffensiveWords, additionalFeaturesOptions, sessionId,
+                        inOutLanguageWeight);
             } finally {
                 mLock.readLock().unlock();
             }
diff --git a/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java b/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
index 69d092751..4c23d2210 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
@@ -327,7 +327,7 @@ public abstract class AndroidWordLevelSpellCheckerSession extends Session {
                 final ArrayList<SuggestedWordInfo> suggestions =
                         dictInfo.mDictionary.getSuggestions(composer, prevWord,
                                 dictInfo.getProximityInfo(), true /* blockOffensiveWords */,
-                                null /* additionalFeaturesOptions */,
+                                null /* additionalFeaturesOptions */, 0 /* sessionId */,
                                 null /* inOutLanguageWeight */);
                 if (suggestions != null) {
                     for (final SuggestedWordInfo suggestion : suggestions) {
diff --git a/java/src/com/android/inputmethod/latin/spellcheck/DictionaryPool.java b/java/src/com/android/inputmethod/latin/spellcheck/DictionaryPool.java
index c99264347..0be256805 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/DictionaryPool.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/DictionaryPool.java
@@ -54,7 +54,7 @@ public final class DictionaryPool extends LinkedBlockingQueue<DictAndKeyboard> {
                 public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
                         final String prevWord, final ProximityInfo proximityInfo,
                         final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-                        final float[] inOutLanguageWeight) {
+                        final int sessionId, final float[] inOutLanguageWeight) {
                     return noSuggestions;
                 }
                 @Override
diff --git a/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedContactsBinaryDictionary.java b/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedContactsBinaryDictionary.java
index a694bf47d..5f6e168b3 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedContactsBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedContactsBinaryDictionary.java
@@ -38,10 +38,10 @@ public final class SynchronouslyLoadedContactsBinaryDictionary extends ContactsB
     public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer codes,
             final String prevWordForBigrams, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
+            final int sessionId, final float[] inOutLanguageWeight) {
         synchronized (mLock) {
             return super.getSuggestions(codes, prevWordForBigrams, proximityInfo,
-                    blockOffensiveWords, additionalFeaturesOptions, inOutLanguageWeight);
+                    blockOffensiveWords, additionalFeaturesOptions, sessionId, inOutLanguageWeight);
         }
     }
 
diff --git a/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedUserBinaryDictionary.java b/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedUserBinaryDictionary.java
index 1a6dd5818..0499ad234 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedUserBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedUserBinaryDictionary.java
@@ -43,10 +43,10 @@ public final class SynchronouslyLoadedUserBinaryDictionary extends UserBinaryDic
     public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer codes,
             final String prevWordForBigrams, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
+            final int sessionId, final float[] inOutLanguageWeight) {
         synchronized (mLock) {
             return super.getSuggestions(codes, prevWordForBigrams, proximityInfo,
-                    blockOffensiveWords, additionalFeaturesOptions, inOutLanguageWeight);
+                    blockOffensiveWords, additionalFeaturesOptions, sessionId, inOutLanguageWeight);
         }
     }