MouseWheelEventQueue should respect ScrollBegin/End state from RenderWidgetHost.

content/browser/renderer_host/input/input_router_impl_perftest.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 <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 77 matching lines @@
   void IncrementInFlightEventCount(
       blink::WebInputEvent::Type event_type) override {}
   void DecrementInFlightEventCount(InputEventAckSource ack_source) override {}
   void OnHasTouchEventHandlers(bool has_handlers) override {}
   void DidFlush() override {}
   void DidOverscroll(const ui::DidOverscrollParams& params) override {}
   void DidStopFlinging() override {}
   void ForwardGestureEventWithLatencyInfo(
       const blink::WebGestureEvent& event,
       const ui::LatencyInfo& latency_info) override {}
+  bool is_in_gesture_scroll(blink::WebGestureDevice device) override {
+    return false;
+  }
 };
 
 class NullIPCSender : public IPC::Sender {
  public:
   NullIPCSender() : sent_count_(0) {}
   ~NullIPCSender() override {}
 
   bool Send(IPC::Message* message) override {
     delete message;
     ++sent_count_;
@@ skipping 287 matching lines @@
 
 TEST_F(InputRouterImplPerfTest, TouchSwipeToGestureScroll) {
   SimulateTouchAndScrollEventSequence("TouchSwipeToGestureScroll ",
                                       kDefaultSteps,
                                       kDefaultOrigin,
                                       kDefaultDistance,
                                       kDefaultIterations);
 }
 
 }  // namespace content