Support InputRouter recycling

content/browser/renderer_host/input/touch_event_queue.cc

Index: content/browser/renderer_host/input/touch_event_queue.cc
diff --git a/content/browser/renderer_host/input/touch_event_queue.cc b/content/browser/renderer_host/input/touch_event_queue.cc
index fa109dedddf9bd87868d6edbe6a7a7fc1cbe9351..2bc48a09b8e4bcc046d677117bcb6f19801fd927 100644
--- a/content/browser/renderer_host/input/touch_event_queue.cc
+++ b/content/browser/renderer_host/input/touch_event_queue.cc
@@ -157,7 +157,7 @@ class TouchEventQueue::TouchTimeoutHandler {
 
   void OnTimeOut() {
     SetPendingAckState(PENDING_ACK_ORIGINAL_EVENT);
-    touch_queue_->FlushQueue();
+    touch_queue_->Flush(INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS);
   }
 
   // Skip a cancel event if the timed-out event had no consumer and was the
@@ -629,6 +629,15 @@ void TouchEventQueue::OnHasTouchEventHandlers(bool has_handlers) {
   has_handlers_ = has_handlers;
 }
 
+void TouchEventQueue::Flush(InputEventAckState flush_ack) {
+  DCHECK(!dispatching_touch_ack_);
+  DCHECK(!dispatching_touch_);
+  pending_async_touchmove_.reset();
+  drop_remaining_touches_in_sequence_ = true;
+  while (!touch_queue_.empty())
+    PopTouchEventToClient(flush_ack);
+}
+
 bool TouchEventQueue::IsPendingAckTouchStart() const {
   DCHECK(!dispatching_touch_ack_);
   if (touch_queue_.empty())
@@ -661,15 +670,6 @@ TouchEventQueue::GetLatestEventForTesting() const {
   return touch_queue_.back()->coalesced_event();
 }
 
-void TouchEventQueue::FlushQueue() {
-  DCHECK(!dispatching_touch_ack_);
-  DCHECK(!dispatching_touch_);
-  pending_async_touchmove_.reset();
-  drop_remaining_touches_in_sequence_ = true;
-  while (!touch_queue_.empty())
-    PopTouchEventToClient(INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS);
-}
-
 void TouchEventQueue::PopTouchEventToClient(InputEventAckState ack_result) {
   AckTouchEventToClient(ack_result, PopTouchEvent(), NULL);
 }