Reset gesture detection upon page navigation for Aura

content/browser/renderer_host/render_widget_host_view_android.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_view_android.h"
 
 #include <android/bitmap.h>
 
 #include "base/android/build_info.h"
 #include "base/basictypes.h"
@@ skipping 797 matching lines @@
 
   return true;
 }
 
 bool RenderWidgetHostViewAndroid::OnTouchHandleEvent(
     const ui::MotionEvent& event) {
   return selection_controller_ &&
          selection_controller_->WillHandleTouchEvent(event);
 }
 
-void RenderWidgetHostViewAndroid::ResetGestureDetection() {
+void RenderWidgetHostViewAndroid::OnMainFrameNavigation() {
   const ui::MotionEvent* current_down_event =
       gesture_provider_.GetCurrentDownEvent();
   if (current_down_event) {
     scoped_ptr<ui::MotionEvent> cancel_event = current_down_event->Cancel();
     OnTouchEvent(*cancel_event);
   }
 
   // A hard reset ensures prevention of any timer-based events.
   gesture_provider_.ResetDetection();
 }
@@ skipping 422 matching lines @@
 
 void RenderWidgetHostViewAndroid::OnSelectionEvent(
     ui::SelectionEventType event,
     const gfx::PointF& position) {
   DCHECK(content_view_core_);
   // Showing the selection action bar can alter the current View coordinates in
   // such a way that the current MotionEvent stream is suddenly shifted in
   // space. Avoid the associated scroll jump by pre-emptively cancelling gesture
   // detection; scrolling after the selection is activated is unnecessary.
   if (event == ui::SelectionEventType::SELECTION_SHOWN)
-    ResetGestureDetection();
+    OnMainFrameNavigation();

[sadrul, 2015/02/03 01:26:16]

This feels wrong? Perhaps have ResetGestureDetector(), and call that from here
and in OnMainFrameNavigation() override?

[lanwei, 2015/02/04 21:10:05]

Done.

   content_view_core_->OnSelectionEvent(event, position);
 }
 
 scoped_ptr<ui::TouchHandleDrawable>
 RenderWidgetHostViewAndroid::CreateDrawable() {
   DCHECK(content_view_core_);
   if (!using_browser_compositor_)
     return content_view_core_->CreatePopupTouchHandleDrawable();
 
   return scoped_ptr<ui::TouchHandleDrawable>(new CompositedTouchHandleDrawable(
@@ skipping 644 matching lines @@
   results->orientationAngle = display.RotationAsDegree();
   results->orientationType =
       RenderWidgetHostViewBase::GetOrientationTypeForMobile(display);
   gfx::DeviceDisplayInfo info;
   results->depth = info.GetBitsPerPixel();
   results->depthPerComponent = info.GetBitsPerComponent();
   results->isMonochrome = (results->depthPerComponent == 0);
 }
 
 } // namespace content