[Tracking Patch] Unified gesture detection

content/browser/renderer_host/input/gesture_event_packet.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_GESTURE_EVENT_PACKET_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_GESTURE_EVENT_PACKET_H_
 
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 
+namespace ui {
+class MotionEvent;
+}
+
 namespace content {
 
 // Acts as a transport container for gestures created (directly or indirectly)
 // by a touch event.
 class CONTENT_EXPORT GestureEventPacket {
  public:
   enum GestureSource {
     UNDEFINED = -1,        // Used only for a default-constructed packet.
     INVALID,               // The source of the gesture was invalid.
     TOUCH_SEQUENCE_BEGIN,  // The start of a new gesture sequence.
@@ skipping 23 matching lines @@
 
   enum { kMaxGesturesPerTouch = 5 };
   blink::WebGestureEvent gestures_[kMaxGesturesPerTouch];
   size_t gesture_count_;
   GestureSource gesture_source_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_GESTURE_EVENT_PACKET_H_