Enable beginning-of-sentence prediction.

Bug: 14119293
Change-Id: I23c407f0afed0ae4af290a1195b0e3bbcd5af8d7

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

@@ -122,12 +122,6 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
         return mBinaryDictionary.isValidDictionary();
     }
 
-    // TODO: Remove and always enable beginning of sentence prediction. Currently, this is enabled
-    // only for ContextualDictionary.
-    protected boolean enableBeginningOfSentencePrediction() {
-        return false;
-    }
-
     /**
      * Creates a new expandable binary dictionary.
      *
@@ -426,10 +420,6 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
                 if (mBinaryDictionary == null) {
                     return null;
                 }
-                if (composer.size() == 0 && prevWordsInfo.mIsBeginningOfSentence
-                        && !enableBeginningOfSentencePrediction()) {
-                    return null;
-                }
                 final ArrayList<SuggestedWordInfo> suggestions =
                         mBinaryDictionary.getSuggestions(composer, prevWordsInfo, proximityInfo,
                                 blockOffensiveWords, additionalFeaturesOptions, sessionId,

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

@@ -42,11 +42,6 @@ public class ContextualDictionary extends ExpandableBinaryDictionary {
         return new ContextualDictionary(context, locale, dictFile);
     }
 
-    @Override
-    protected boolean enableBeginningOfSentencePrediction() {
-        return true;
-    }
-
     @Override
     public boolean isValidWord(final String word) {
         // Strings out of this dictionary should not be considered existing words.