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

content/browser/renderer_host/input/touch_emulator.cc

Index: content/browser/renderer_host/input/touch_emulator.cc
diff --git a/content/browser/renderer_host/input/touch_emulator.cc b/content/browser/renderer_host/input/touch_emulator.cc
index 4f6eb86e3eea8723f5d158c952e0b9b2d6f39624..f0e3f01b960cfab34083c501d3cdd379ba3ecea8 100644
--- a/content/browser/renderer_host/input/touch_emulator.cc
+++ b/content/browser/renderer_host/input/touch_emulator.cc
@@ -6,6 +6,7 @@
 
 #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"
@@ -258,10 +259,12 @@
     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;
   }
 
@@ -269,7 +272,8 @@
   // 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;
   }
 
@@ -289,8 +293,9 @@
 
     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;
   }