gesture: Make sure a combination of sync/async touch-events work correctly.

ui/base/gestures/gesture_recognizer_impl.h

 // Copyright (c) 2012 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 UI_BASE_GESTURES_GESTURE_RECOGNIZER_IMPL_H_
 #define UI_BASE_GESTURES_GESTURE_RECOGNIZER_IMPL_H_
 
 #include <map>
 #include <queue>
 #include <vector>
@@ skipping 28 matching lines @@
   virtual void TransferEventsTo(GestureConsumer* current_consumer,
                                 GestureConsumer* new_consumer) OVERRIDE;
   virtual bool GetLastTouchPointForTarget(GestureConsumer* consumer,
                                           gfx::Point* point) OVERRIDE;
 
  protected:
   virtual GestureSequence* CreateSequence(GestureEventHelper* helper);
   virtual GestureSequence* GetGestureSequenceForConsumer(GestureConsumer* c);
 
  private:
+  // Sets up the target consumer for gestures based on the touch-event.
+  void SetupTargets(const TouchEvent& event, GestureConsumer* consumer);
+
+  // Processes the next queued touch-event (and discards the touch-event). The
+  // called must take ownership of the returned gestures and free them when they
+  // are not needed anymore.
+  Gestures* AdvanceTouchQueueByOne(GestureConsumer* consumer,
+                                   ui::TouchStatus status);
+
   // Overridden from GestureRecognizer
   virtual Gestures* ProcessTouchEventForGesture(
       const TouchEvent& event,
       ui::TouchStatus status,
       GestureConsumer* target) OVERRIDE;
   virtual void QueueTouchEventForGesture(GestureConsumer* consumer,
                                          const TouchEvent& event) OVERRIDE;
   virtual Gestures* AdvanceTouchQueue(GestureConsumer* consumer,
                                       bool processed) OVERRIDE;
   virtual void FlushTouchQueue(GestureConsumer* consumer) OVERRIDE;
@@ skipping 13 matching lines @@
   // gesture_consumer_ignorer_.
   scoped_ptr<GestureConsumer> gesture_consumer_ignorer_;
   GestureEventHelper* helper_;
 
   DISALLOW_COPY_AND_ASSIGN(GestureRecognizerImpl);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_GESTURES_GESTURE_RECOGNIZER_IMPL_H_