InputHandlerProxy to inform blink scheduler of input events

content/renderer/input/input_handler_wrapper.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_wrapper.h"
 
 #include "base/message_loop/message_loop_proxy.h"
 #include "content/renderer/input/input_event_filter.h"
 #include "content/renderer/input/input_handler_manager.h"
 #include "third_party/WebKit/public/platform/Platform.h"
 
 namespace content {
 
 InputHandlerWrapper::InputHandlerWrapper(
     InputHandlerManager* input_handler_manager,
     int routing_id,
     const scoped_refptr<base::MessageLoopProxy>& main_loop,
     const base::WeakPtr<cc::InputHandler>& input_handler,
     const base::WeakPtr<RenderViewImpl>& render_view_impl)
     : input_handler_manager_(input_handler_manager),
       routing_id_(routing_id),
       input_handler_proxy_(input_handler.get(), this),
       main_loop_(main_loop),
+      web_scheduler_proxy_(blink::WebSchedulerProxy::create()),
       render_view_impl_(render_view_impl) {
   DCHECK(input_handler);
 }
 
 InputHandlerWrapper::~InputHandlerWrapper() {
 }
 
 void InputHandlerWrapper::TransferActiveWheelFlingAnimation(
     const blink::WebActiveWheelFlingParameters& params) {
   main_loop_->PostTask(
@@ skipping 16 matching lines @@
 }
 
 void InputHandlerWrapper::DidOverscroll(const DidOverscrollParams& params) {
   input_handler_manager_->DidOverscroll(routing_id_, params);
 }
 
 void InputHandlerWrapper::DidStopFlinging() {
   input_handler_manager_->DidStopFlinging(routing_id_);
 }
 
+void InputHandlerWrapper::DidHandleInputEvent() {
+  web_scheduler_proxy_.didReceiveInputEvent();

[jdduke (slow), 2014/09/10 17:02:26]

What kind of work might this call trigger?

[Sami, 2014/09/10 17:23:00]

It lets the scheduler know the time of the last incoming input event so we can
estimate if they user is interacting with the device or not. This notification
by itself won't cause any work other than grabbing a lock (or an atomic write),
looking at the current time and setting a flag.

+}
+
 }  // namespace content