Add a passthrough touch event queue.

content/browser/renderer_host/input/legacy_touch_event_queue.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_LEGACY_TOUCH_EVENT_QUEUE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_LEGACY_TOUCH_EVENT_QUEUE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 78 matching lines @@
 
   size_t size() const { return touch_queue_.size(); }
 
   bool has_handlers() const { return has_handlers_; }
 
   size_t uncancelable_touch_moves_pending_ack_count() const {
     return ack_pending_async_touchmove_ids_.size();
   }
 
  private:
-  friend class TouchEventQueueTest;
+  friend class LegacyTouchEventQueueTest;
 
   bool HasPendingAsyncTouchMoveForTesting() const;
   bool IsTimeoutRunningForTesting() const;
   const TouchEventWithLatencyInfo& GetLatestEventForTesting() const;
 
   // Empties the queue of touch events. This may result in any number of gesture
   // events being sent to the renderer.
   void FlushQueue() override;
 
   // Walks the queue, checking each event with |FilterBeforeForwarding()|.
@@ skipping 91 matching lines @@
 
   // Event is saved to compare pointer positions for new touchmove events.
   std::unique_ptr<blink::WebTouchEvent> last_sent_touchevent_;
 
   DISALLOW_COPY_AND_ASSIGN(LegacyTouchEventQueue);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_LEGACY_TOUCH_EVENT_QUEUE_H_