[VSync Queue] Plug touch ack to gesture events and flush vsync queue if necessary

content/browser/renderer_host/render_widget_host_view_aura.cc

 // 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.
 
 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <set>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 1018 matching lines @@
     InputEventAckState ack_result) {
   aura::WindowTreeHost* host = window_->GetHost();
   // |host| is NULL during tests.
   if (!host)
     return;
 
   // The TouchScrollStarted event is generated & consumed downstream from the
   // TouchEventQueue. So we don't expect an ACK up here.
   DCHECK(touch.event.GetType() != blink::WebInputEvent::kTouchScrollStarted);
 
-  ui::EventResult result = (ack_result == INPUT_EVENT_ACK_STATE_CONSUMED)
-                               ? ui::ER_HANDLED
-                               : ui::ER_UNHANDLED;
+  ui::EventResult result;
+  switch (ack_result) {
+    case INPUT_EVENT_ACK_STATE_CONSUMED:
+      result = ui::ER_HANDLED;
+      break;
+    case INPUT_EVENT_ACK_STATE_IGNORED:

[dtapuska, 2017/05/25 15:40:12]

I'm not sure we should map Ignored to ignored_non_blocking; I believe the
Renderer can still return IGNORED. I think you really want to map the
SET_NON_BLOCKING/SET_NON_BLOCKING_FLING states don't you?

+      result = ui::ER_IGNORED_NON_BLOCKING;
+      break;
+    default:
+      result = ui::ER_UNHANDLED;
+      break;
+  }
 
   blink::WebTouchPoint::State required_state;
   switch (touch.event.GetType()) {
     case blink::WebInputEvent::kTouchStart:
       required_state = blink::WebTouchPoint::kStatePressed;
       break;
     case blink::WebInputEvent::kTouchEnd:
       required_state = blink::WebTouchPoint::kStateReleased;
       break;
     case blink::WebInputEvent::kTouchMove:
@@ skipping 1355 matching lines @@
 }
 
 void RenderWidgetHostViewAura::UpdateNeedsBeginFramesInternal() {
   if (!delegated_frame_host_)
     return;
   delegated_frame_host_->SetNeedsBeginFrames(needs_begin_frames_ ||
                                              needs_flush_input_);
 }
 
 }  // namespace content