Notify Blink to suppress frame requests during BeginMainFrame

content/renderer/render_widget.cc

 // Copyright (c) 2012 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/render_widget.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 923 matching lines @@
 bool RenderWidget::IsClosing() const {
   return host_closing_;
 }
 
 void RenderWidget::RequestScheduleAnimation() {
   scheduleAnimation();
 }
 
 void RenderWidget::UpdateVisualState() {
   GetWebWidget()->updateAllLifecyclePhases();
+  GetWebWidget()->setSuppressFrameRequestsWorkaroundFor704763Only(false);
 
   if (time_to_first_active_paint_recorded_)
     return;
 
   RenderThreadImpl* render_thread_impl = RenderThreadImpl::current();
   if (!render_thread_impl->NeedsToRecordFirstActivePaint())
     return;
 
   time_to_first_active_paint_recorded_ = true;
   base::TimeDelta sample = base::TimeTicks::Now() - was_shown_time_;
   UMA_HISTOGRAM_TIMES("PurgeAndSuspend.Experimental.TimeToFirstActivePaint",
                       sample);
 }
 
 void RenderWidget::WillBeginCompositorFrame() {
   TRACE_EVENT0("gpu", "RenderWidget::willBeginCompositorFrame");
 
+  GetWebWidget()->setSuppressFrameRequestsWorkaroundFor704763Only(true);
+
   // The UpdateTextInputState can result in further layout and possibly
   // enable GPU acceleration so they need to be called before any painting
   // is done.
   UpdateTextInputState();
   UpdateSelectionBounds();
 
   for (auto& observer : render_frame_proxies_)
     observer.WillBeginCompositorFrame();
 }
 
@@ skipping 1352 matching lines @@
     // browser side (https://crbug.com/669219).
     // If there is no WebFrameWidget, then there will be no
     // InputMethodControllers for a WebLocalFrame.
     return nullptr;
   }
   return static_cast<blink::WebFrameWidget*>(GetWebWidget())
       ->getActiveWebInputMethodController();
 }
 
 }  // namespace content