[Android] Always insert a TouchCancel if window or tab focus is lost

content/browser/renderer_host/input/content_gesture_provider.cc

 // Copyright 2014 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/input/content_gesture_provider.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "content/public/common/content_switches.h"
@@ skipping 180 matching lines @@
 
 void ContentGestureProvider::SetDoubleTapSupportForPlatformEnabled(
     bool enabled) {
   gesture_provider_.SetDoubleTapSupportForPlatformEnabled(enabled);
 }
 
 void ContentGestureProvider::SetDoubleTapSupportForPageEnabled(bool enabled) {
   gesture_provider_.SetDoubleTapSupportForPageEnabled(enabled);
 }
 
+const ui::MotionEvent* ContentGestureProvider::GetCurrentDownEvent() const {
+  return gesture_provider_.current_down_event();
+}
+
 void ContentGestureProvider::OnGestureEvent(
     const ui::GestureEventData& event) {
   if (handling_event_) {
     pending_gesture_packet_.Push(event);
     return;
   }
 
   gesture_filter_.OnGesturePacket(
       ui::GestureEventDataPacket::FromTouchTimeout(event));
 }
 
 void ContentGestureProvider::ForwardGestureEvent(
     const ui::GestureEventData& event) {
   client_->OnGestureEvent(CreateGesture(event, touch_to_gesture_scale_));
 }
 
 }  // namespace content