Properly forward queued touch events

content/browser/renderer_host/input/touch_event_queue.cc

 // Copyright 2013 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/touch_event_queue.h"
 
 #include "base/auto_reset.h"
 #include "base/debug/trace_event.h"
 #include "base/stl_util.h"
 
@@ skipping 90 matching lines @@
     STLDeleteElements(&touch_queue_);
 }
 
 void TouchEventQueue::QueueEvent(const TouchEventWithLatencyInfo& event) {
   // If the queueing of |event| was triggered by an ack dispatch, defer
   // processing the event until the dispatch has finished.
   if (touch_queue_.empty() && !dispatching_touch_ack_) {
     // There is no touch event in the queue. Forward it to the renderer
     // immediately.
     touch_queue_.push_back(new CoalescedWebTouchEvent(event));
-    if (ShouldForwardToRenderer(event.event))
-      client_->SendTouchEventImmediately(event);
-    else
-      PopTouchEventToClient(INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS,
-                            ui::LatencyInfo());
+    TryForwardNextEventToRenderer();
     return;
   }
 
   // If the last queued touch-event was a touch-move, and the current event is
   // also a touch-move, then the events can be coalesced into a single event.
   if (touch_queue_.size() > 1) {
     CoalescedWebTouchEvent* last_event = touch_queue_.back();
     if (last_event->CoalesceEventIfPossible(event))
       return;
   }
@@ skipping 20 matching lines @@
     }
   } else if (event.type == WebKit::WebInputEvent::TouchStart) {
     for (unsigned i = 0; i < event.touchesLength; ++i) {
       const WebKit::WebTouchPoint& point = event.touches[i];
       if (point.state == WebKit::WebTouchPoint::StatePressed)
         touch_ack_states_[point.id] = ack_result;
     }
   }
 
   PopTouchEventToClient(ack_result, latency_info);
+  TryForwardNextEventToRenderer();
+}
 
+void TouchEventQueue::TryForwardNextEventToRenderer() {
   // If there are queued touch events, then try to forward them to the renderer
   // immediately, or ACK the events back to the client if appropriate.
   while (!touch_queue_.empty()) {
     const TouchEventWithLatencyInfo& touch =
         touch_queue_.front()->coalesced_event();
     if (ShouldForwardToRenderer(touch.event)) {
       client_->SendTouchEventImmediately(touch);
       break;
     }
     PopTouchEventToClient(INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS,
@@ skipping 64 matching lines @@
       // If the ACK status of a point is unknown, then the event should be
       // forwarded to the renderer.
       return true;
     }
   }
 
   return false;
 }
 
 }  // namespace content