Support InputRouter recycling

content/browser/renderer_host/input/touch_event_queue.h

Index: content/browser/renderer_host/input/touch_event_queue.h
diff --git a/content/browser/renderer_host/input/touch_event_queue.h b/content/browser/renderer_host/input/touch_event_queue.h
index 3bdab903750f69d119f6f1f077c7f2a89ce3f784..8420a885e33735da1c5d34b297add8c8f937e64e 100644
--- a/content/browser/renderer_host/input/touch_event_queue.h
+++ b/content/browser/renderer_host/input/touch_event_queue.h
@@ -106,6 +106,10 @@ class CONTENT_EXPORT TouchEventQueue {
   // Notifies the queue whether the renderer has at least one touch handler.
   void OnHasTouchEventHandlers(bool has_handlers);
 
+  // Empties the queue of touch events, ack'ing each in turn with |ack_state|.
+  // This may result in any number of gesture events being sent to the renderer.
+  void Flush(InputEventAckState flush_ack);
+
   // Returns whether the currently pending touch event (waiting ACK) is for
   // a touch start event.
   bool IsPendingAckTouchStart() const;
@@ -139,10 +143,6 @@ class CONTENT_EXPORT TouchEventQueue {
   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();
-
   // Walks the queue, checking each event with |FilterBeforeForwarding()|.
   // If allowed, forwards the touch event and stops processing further events.
   // Otherwise, acks the event with |INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS|.