Fix crash when scrolling a layer

Change-Id: I6e61f3b38c5d1291ceb36c9dfa87fcd78480c2f4

Author: jreck

core/java/android/webkit/WebViewCore.java

@@ -1742,6 +1742,7 @@ public void handleMessage(Message msg) {
                             Rect rect = (Rect) msg.obj;
                             nativeScrollLayer(mNativeClass, nativeLayer,
                                     rect);
+                            break;
 
                         case DELETE_TEXT: {
                             int[] handles = (int[]) msg.obj;