Change the non-blocking event queue to the main thread event queue.

content/renderer/input/non_blocking_event_queue.h

-// Copyright 2016 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.
-
-#ifndef CONTENT_RENDERER_INPUT_NON_BLOCKING_EVENT_QUEUE_H_
-#define CONTENT_RENDERER_INPUT_NON_BLOCKING_EVENT_QUEUE_H_
-
-#include <deque>
-#include "content/common/content_export.h"
-#include "content/common/input/event_with_latency_info.h"
-#include "content/common/input/web_input_event_queue.h"
-#include "third_party/WebKit/public/web/WebInputEvent.h"
-#include "ui/events/latency_info.h"
-
-namespace content {
-
-class CONTENT_EXPORT NonBlockingEventQueueClient {
- public:
-  // Send an |event| that was previously queued (possibly
-  // coalesced with another event) to the |routing_id|'s
-  // channel. Implementors must implement this callback.
-  virtual void SendNonBlockingEvent(int routing_id,
-                                    const blink::WebInputEvent* event,
-                                    const ui::LatencyInfo& latency) = 0;
-};
-
-// NonBlockingEventQueue implements a series of queues (one touch
-// and one mouse wheel) for events that need to be queued between
-// the compositor and main threads. When a non-blocking event is sent
-// from the compositor to main it can either be sent directly if no
-// outstanding events of that type are in flight; or it needs to
-// wait in a queue until the main thread has finished processing
-// the in-flight event. This class tracks the state and queues
-// for the event types. Methods on this class should only be called
-// from the compositor thread.
-//
-class CONTENT_EXPORT NonBlockingEventQueue {
- public:
-  NonBlockingEventQueue(int routing_id, NonBlockingEventQueueClient* client);
-  ~NonBlockingEventQueue();
-
-  // Called once compositor has handled |event| and indicated that it is
-  // a non-blocking event to be queued to the main thread.
-  void HandleEvent(const blink::WebInputEvent* event,
-                   const ui::LatencyInfo& latency);
-
-  // Call once main thread has handled outstanding |type| event in flight.
-  void EventHandled(blink::WebInputEvent::Type type);
-
- private:
-  friend class NonBlockingEventQueueTest;
-  int routing_id_;
-  NonBlockingEventQueueClient* client_;
-  WebInputEventQueue<MouseWheelEventWithLatencyInfo> wheel_events_;
-  WebInputEventQueue<TouchEventWithLatencyInfo> touch_events_;
-
-  DISALLOW_COPY_AND_ASSIGN(NonBlockingEventQueue);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_INPUT_NON_BLOCKING_EVENT_QUEUE_H_