Support InputRouter recycling

content/browser/renderer_host/input/gesture_event_queue.cc

 // 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.
 
 #include "content/browser/renderer_host/input/gesture_event_queue.h"
 
 #include "base/debug/trace_event.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/browser/renderer_host/input/input_router.h"
 #include "content/browser/renderer_host/input/touchpad_tap_suppression_controller.h"
@@ skipping 227 matching lines @@
 bool GestureEventQueue::ShouldHandleEventNow() const {
   return coalesced_gesture_events_.size() == 1;
 }
 
 void GestureEventQueue::ForwardGestureEvent(
     const GestureEventWithLatencyInfo& gesture_event) {
   if (ShouldForwardForCoalescing(gesture_event))
     client_->SendGestureEventImmediately(gesture_event);
 }
 
+void GestureEventQueue::Recycle() {
+  fling_in_progress_ = false;
+  scrolling_in_progress_ = false;
+  ignore_next_ack_ = false;
+  coalesced_gesture_events_.clear();
+  debouncing_deferral_queue_.clear();
+  touchpad_tap_suppression_controller_.Reset();
+  touchscreen_tap_suppression_controller_.Reset();
+}
+
 void GestureEventQueue::SendScrollEndingEventsNow() {
   scrolling_in_progress_ = false;
   if (debouncing_deferral_queue_.empty())
     return;
   GestureQueue debouncing_deferral_queue;
   debouncing_deferral_queue.swap(debouncing_deferral_queue_);
   for (GestureQueue::const_iterator it = debouncing_deferral_queue.begin();
        it != debouncing_deferral_queue.end(); it++) {
     if (ShouldForwardForGFCFiltering(*it) &&
         ShouldForwardForTapSuppression(*it) &&
@@ skipping 111 matching lines @@
     return 0;
 
   if (!ignore_next_ack_)
     return 1;
 
   DCHECK_GT(coalesced_gesture_events_.size(), 1U);
   return 2;
 }
 
 }  // namespace content