Disable overscroll navigation when emulating touch.

content/browser/renderer_host/render_widget_host_impl.cc

 // Copyright (c) 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.
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 #include <set>
 #include <utility>
 
@@ skipping 1593 matching lines @@
   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH5"));
   GetProcess()->ReceivedBadMessage();
 }
 
 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
   SetCursor(cursor);
 }
 
 void RenderWidgetHostImpl::OnSetTouchEventEmulationEnabled(
     bool enabled, bool allow_pinch) {
+  if (delegate_)
+    delegate_->OnTouchEmulationEnabled(enabled);
+
   if (enabled) {
     if (!touch_emulator_)
       touch_emulator_.reset(new TouchEmulator(this));
     touch_emulator_->Enable(allow_pinch);
   } else {
     if (touch_emulator_)
       touch_emulator_->Disable();
   }
 }
 
@@ skipping 680 matching lines @@
   }
 }
 
 SkBitmap::Config RenderWidgetHostImpl::PreferredReadbackFormat() {
   if (view_)
     return view_->PreferredReadbackFormat();
   return SkBitmap::kARGB_8888_Config;
 }
 
 }  // namespace content