Emulate Android joystick scroll with synthetic mouse wheel event

content/public/android/java/src/org/chromium/content/browser/ContentView.java

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.content.browser;
 
 import android.content.Context;
 import android.content.res.Configuration;
 import android.graphics.Rect;
 import android.os.Build;
@@ skipping 206 matching lines @@
     }
 
     /**
      * Currently the ContentView scrolling happens in the native side. In
      * the Java view system, it is always pinned at (0, 0). scrollBy() and scrollTo()
      * are overridden, so that View's mScrollX and mScrollY will be unchanged at
      * (0, 0). This is critical for drawing ContentView correctly.
      */
     @Override
     public void scrollBy(int x, int y) {
-        mContentViewCore.scrollBy(x, y, false);
+        mContentViewCore.scrollBy(x, y);
     }
 
     @Override
     public void scrollTo(int x, int y) {
         mContentViewCore.scrollTo(x, y);
     }
 
     @Override
     protected int computeHorizontalScrollExtent() {
         // TODO(dtrainor): Need to expose scroll events properly to public. Either make getScroll*
@@ skipping 126 matching lines @@
         public ContentViewApi23(Context context, ContentViewCore cvc) {
             super(context, cvc);
         }
 
         @Override
         public void onProvideVirtualStructure(final ViewStructure structure) {
             mContentViewCore.onProvideVirtualStructure(structure, false);
         }
     }
 }