Make disable vsync run the renderer independently

content/browser/renderer_host/compositor_impl_android.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/browser/renderer_host/compositor_impl_android.h"
 
 #include <android/bitmap.h>
 #include <android/native_window_jni.h>
 #include <stdint.h>
 #include <unordered_set>
@@ skipping 136 matching lines @@
       : compositor_(compositor) {
     compositor_->AddObserver(this);
   }
   ~ExternalBeginFrameSource() override { compositor_->RemoveObserver(this); }
 
   // cc::BeginFrameSource implementation.
   void AddObserver(cc::BeginFrameObserver* obs) override;
   void RemoveObserver(cc::BeginFrameObserver* obs) override;
   void DidFinishFrame(cc::BeginFrameObserver* obs,
                       size_t remaining_frames) override {}
+  bool IsThrottled() const override { return true; }
 
   // CompositorImpl::VSyncObserver implementation.
   void OnVSync(base::TimeTicks frame_time,
                base::TimeDelta vsync_period) override;
 
  private:
   CompositorImpl* const compositor_;
   std::unordered_set<cc::BeginFrameObserver*> observers_;
   cc::BeginFrameArgs last_begin_frame_args_;
 };
@@ skipping 643 matching lines @@
 
   TRACE_EVENT0("compositor", "Compositor::SetNeedsAnimate");
   host_->SetNeedsAnimate();
 }
 
 bool CompositorImpl::HavePendingReadbacks() {
   return !readback_layer_tree_->children().empty();
 }
 
 }  // namespace content