MouseWheelEventQueue should respect ScrollBegin/End state from RenderWidgetHost.

content/browser/renderer_host/input/input_router_impl.cc

 // Copyright 2013 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/input_router_impl.h"
 
 #include <math.h>
 
 #include <utility>
 
@@ skipping 293 matching lines @@
   touch_event_queue_->OnGestureEventAck(event, ack_result);
   ack_handler_->OnGestureEventAck(event, ack_result);
 }
 
 void InputRouterImpl::ForwardGestureEventWithLatencyInfo(
     const blink::WebGestureEvent& event,
     const ui::LatencyInfo& latency_info) {
   client_->ForwardGestureEventWithLatencyInfo(event, latency_info);
 }
 
+bool InputRouterImpl::is_in_gesture_scroll() {
+  return client_->is_in_gesture_scroll(
+      blink::WebGestureDevice::kWebGestureDeviceTouchpad);
+}
+
 void InputRouterImpl::SendMouseWheelEventImmediately(
     const MouseWheelEventWithLatencyInfo& wheel_event) {
   FilterAndSendWebInputEvent(wheel_event.event, wheel_event.latency);
 }
 
 void InputRouterImpl::OnMouseWheelEventAck(
     const MouseWheelEventWithLatencyInfo& event,
     InputEventAckState ack_result) {
   ack_handler_->OnWheelEventAck(event, ack_result);
 }
@@ skipping 345 matching lines @@
         DCHECK(global_touch_position_.find(touch_point->id) ==
                global_touch_position_.end());
         global_touch_position_[touch_point->id] = gfx::Point(
             touch_point->screen_position.x, touch_point->screen_position.y);
       }
     }
   }
 }
 
 }  // namespace content