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

content/browser/renderer_host/input/touch_emulator.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/touch_emulator.h"
 
 #include "build/build_config.h"
 #include "content/browser/renderer_host/input/motion_event_web.h"
+#include "content/browser/renderer_host/ui_events_helper.h"
 #include "content/common/input/web_touch_event_traits.h"
 #include "content/grit/content_resources.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
 #include "third_party/WebKit/public/platform/WebKeyboardEvent.h"
 #include "third_party/WebKit/public/platform/WebMouseEvent.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/events/base_event_utils.h"
 #include "ui/events/blink/blink_event_util.h"
@@ skipping 232 matching lines @@
 }
 
 void TouchEmulator::HandleEmulatedTouchEvent(blink::WebTouchEvent event) {
   DCHECK(gesture_provider_);
   event.unique_touch_event_id = ui::GetNextTouchEventId();
   auto result = gesture_provider_->OnTouchEvent(MotionEventWeb(event));
   if (!result.succeeded)
     return;
 
   const bool event_consumed = true;
+  const bool is_source_touch_event_set_non_blocking = false;
   // Block emulated event when emulated native stream is active.
   if (native_stream_active_sequence_count_) {
     gesture_provider_->OnTouchEventAck(event.unique_touch_event_id,
-                                       event_consumed);
+                                       event_consumed,
+                                       is_source_touch_event_set_non_blocking);
     return;
   }
 
   bool is_sequence_start = WebTouchEventTraits::IsTouchSequenceStart(event);
   // Do not allow middle-sequence event to pass through, if start was blocked.
   if (!emulated_stream_active_sequence_count_ && !is_sequence_start) {
     gesture_provider_->OnTouchEventAck(event.unique_touch_event_id,
-                                       event_consumed);
+                                       event_consumed,
+                                       is_source_touch_event_set_non_blocking);
     return;
   }
 
   if (is_sequence_start)
     emulated_stream_active_sequence_count_++;
 
   event.moved_beyond_slop_region = result.moved_beyond_slop_region;
   client_->ForwardEmulatedTouchEvent(event);
 }
 
 bool TouchEmulator::HandleTouchEventAck(
     const blink::WebTouchEvent& event, InputEventAckState ack_result) {
   bool is_sequence_end = WebTouchEventTraits::IsTouchSequenceEnd(event);
   if (emulated_stream_active_sequence_count_) {
     if (is_sequence_end)
       emulated_stream_active_sequence_count_--;
 
     const bool event_consumed = ack_result == INPUT_EVENT_ACK_STATE_CONSUMED;
     if (gesture_provider_)
-      gesture_provider_->OnTouchEventAck(event.unique_touch_event_id,
-                                         event_consumed);
+      gesture_provider_->OnTouchEventAck(
+          event.unique_touch_event_id, event_consumed,
+          InputEventAckStateIsSetNonBlocking(ack_result));
     return true;
   }
 
   // We may have not seen native touch sequence start (when created in the
   // middle of a sequence), so don't decrement sequence count below zero.
   if (is_sequence_end && native_stream_active_sequence_count_)
     native_stream_active_sequence_count_--;
   return false;
 }
 
@@ skipping 173 matching lines @@
   point.tilt_x = 0;
   point.tilt_y = 0;
   point.pointer_type = blink::WebPointerProperties::PointerType::kTouch;
 }
 
 bool TouchEmulator::InPinchGestureMode() const {
   return shift_pressed_;
 }
 
 }  // namespace content