Bug 709120 - Add tiled buffer support for Android/native. r=pcwalton

This adds support for rendering to a tiled software buffer when using the
Java compositor. Tiles are assumed to be packed tight and stored sequentially,
by row.

widget/android/AndroidJavaWrappers.cpp

@@ -408,6 +408,10 @@ AndroidGeckoEvent::Init(JNIEnv *jenv, jobject jobj)
     mType = jenv->GetIntField(jobj, jTypeField);
 
     switch (mType) {
+        case TILE_SIZE:
+            ReadP0Field(jenv);
+            break;
+
         case SIZE_CHANGED:
             ReadP0Field(jenv);
             ReadP1Field(jenv);