[cc]: Add a BeginMainFrameNotExpectedSoon signal and route it to the RendererScheduler.

content/renderer/scheduler/renderer_scheduler_impl.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/renderer/scheduler/renderer_scheduler_impl.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
@@ skipping 101 matching lines @@
 
   base::TimeTicks now(Now());
   if (now < estimated_next_frame_begin_) {
     StartIdlePeriod();
     control_task_runner_->PostDelayedTask(FROM_HERE,
                                           end_idle_period_closure_.callback(),
                                           estimated_next_frame_begin_ - now);
   }
 }
 
+void RendererSchedulerImpl::BeginFrameNoLongerRequired() {
+  TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("renderer.scheduler"),
+               "RendererSchedulerImpl::BeginFrameNoLongerRequired");
+  // TODO(rmcilroy): Implement long idle times.
+}
+
 void RendererSchedulerImpl::DidReceiveInputEventOnCompositorThread(
     blink::WebInputEvent::Type type) {
   TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("renderer.scheduler"),
                "RendererSchedulerImpl::DidReceiveInputEventOnCompositorThread");
   // Ignore mouse events because on windows these can very frequent.
   // Ignore keyboard events because it doesn't really make sense to enter
   // compositor priority for them.
   if (blink::WebInputEvent::isMouseEventType(type) ||
       blink::WebInputEvent::isKeyboardEventType(type)) {
     return;
@@ skipping 201 matching lines @@
   state->SetDouble("last_input_time",
                    (last_input_time_ - base::TimeTicks()).InMillisecondsF());
   state->SetDouble(
       "estimated_next_frame_begin",
       (estimated_next_frame_begin_ - base::TimeTicks()).InMillisecondsF());
 
   return state;
 }
 
 }  // namespace content