Remove personalization dicts for multilingual users.

Bug: 13067743
Change-Id: I1f50cb137b6054dc9442237586b70fc0aa2bf427

java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java

@@ -512,7 +512,6 @@ public class DictionaryFacilitatorForSuggest {
         }
     }
 
-    @UsedForTesting
     public void clearUserHistoryDictionary() {
         if (mUserHistoryDictionary == null) {
             return;

java/src/com/android/inputmethod/latin/LatinIME.java

@@ -534,17 +534,28 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
     }
 
     private void refreshPersonalizationDictionarySession() {
+        final Suggest suggest = mInputLogic.mSuggest;
+        final boolean shouldKeepUserHistoryDictionaries;
+        final boolean shouldKeepPersonalizationDictionaries;
         if (mSettings.getCurrent().mUsePersonalizedDicts) {
-            if (mSubtypeSwitcher.isSystemLocaleSameAsLocaleOfAllEnabledSubtypes()) {
+            shouldKeepUserHistoryDictionaries = true;
-                final DictionaryFacilitatorForSuggest dictionaryFacilitator =
+            // TODO: Eliminate this restriction
-                        (mInputLogic.mSuggest == null) ?
+            shouldKeepPersonalizationDictionaries =
-                                null : mInputLogic.mSuggest.mDictionaryFacilitator;
+                    mSubtypeSwitcher.isSystemLocaleSameAsLocaleOfAllEnabledSubtypes();
-                PersonalizationDictionarySessionRegistrar.init(this, dictionaryFacilitator);
-            } else {
-                PersonalizationDictionarySessionRegistrar.close(this);
-            }
         } else {
-            PersonalizationHelper.removeAllPersonalizedDictionaries(this);
+            shouldKeepUserHistoryDictionaries = false;
+            shouldKeepPersonalizationDictionaries = false;
+        }
+        if (!shouldKeepUserHistoryDictionaries) {
+            // Remove user history dictionaries.
+            PersonalizationHelper.removeAllUserHistoryDictionaries(this);
+            if (suggest != null) {
+                suggest.mDictionaryFacilitator.clearUserHistoryDictionary();
+            }
+        }
+        if (!shouldKeepPersonalizationDictionaries) {
+            // Remove personalization dictionaries.
+            PersonalizationHelper.removeAllPersonalizationDictionaries(this);
             PersonalizationDictionarySessionRegistrar.resetAll(this);
         }
     }

java/src/com/android/inputmethod/latin/personalization/PersonalizationHelper.java

@@ -93,13 +93,16 @@ public class PersonalizationHelper {
         }
     }
 
-    public static void removeAllPersonalizedDictionaries(final Context context) {
+    public static void removeAllPersonalizationDictionaries(final Context context) {
-        removeAllDictionaries(context, sLangUserHistoryDictCache,
-                UserHistoryDictionary.NAME);
         removeAllDictionaries(context, sLangPersonalizationDictCache,
                 PersonalizationDictionary.NAME);
     }
 
+    public static void removeAllUserHistoryDictionaries(final Context context) {
+        removeAllDictionaries(context, sLangUserHistoryDictCache,
+                UserHistoryDictionary.NAME);
+    }
+
     private static <T extends DecayingExpandableBinaryDictionaryBase> void removeAllDictionaries(
             final Context context, final ConcurrentHashMap<String, SoftReference<T>> dictionaryMap,
             final String dictNamePrefix) {