Teach main thread event queue about closures.

content/renderer/input/input_handler_manager.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/renderer/input/input_handler_manager.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 212 matching lines @@
 
   TRACE_EVENT1("input,rail", "InputHandlerManager::HandleInputEvent",
                "result", "EventSentToInputHandlerProxy");
   InputHandlerProxy* proxy = it->second->input_handler_proxy();
   proxy->HandleInputEventWithLatencyInfo(
       std::move(input_event), latency_info,
       base::Bind(&InputHandlerManager::DidHandleInputEventAndOverscroll,
                  weak_ptr_factory_.GetWeakPtr(), callback));
 }
 
+void InputHandlerManager::QueueClosureForMainThreadEventQueue(
+    int routing_id,
+    const base::Closure& closure) {
+  client_->QueueClosureForMainThreadEventQueue(routing_id, closure);
+}
+
 void InputHandlerManager::DidHandleInputEventAndOverscroll(
     const InputEventAckStateCallback& callback,
     InputHandlerProxy::EventDisposition event_disposition,
     ui::WebScopedInputEvent input_event,
     const ui::LatencyInfo& latency_info,
     std::unique_ptr<ui::DidOverscrollParams> overscroll_params) {
   InputEventAckState input_event_ack_state =
       InputEventDispositionToAck(event_disposition);
   switch (input_event_ack_state) {
     case INPUT_EVENT_ACK_STATE_CONSUMED:
@@ skipping 38 matching lines @@
 void InputHandlerManager::DispatchNonBlockingEventToMainThread(
     int routing_id,
     ui::WebScopedInputEvent event,
     const ui::LatencyInfo& latency_info) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   client_->DispatchNonBlockingEventToMainThread(routing_id, std::move(event),
                                                 latency_info);
 }
 
 }  // namespace content