cc: Remove OutputSurfaceClient::DidSwapBuffers().

services/ui/public/cpp/lib/output_surface.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 "services/ui/public/cpp/output_surface.h"
 
 #include "base/bind.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/output_surface_client.h"
@@ skipping 27 matching lines @@
   NOTREACHED();
 }
 
 uint32_t OutputSurface::GetFramebufferCopyTextureFormat() {
   // This is a delegating output surface, no framebuffer/direct drawing support.
   NOTREACHED();
   return 0;
 }
 
 void OutputSurface::SwapBuffers(cc::CompositorFrame frame) {
-  // TODO(fsamuel, rjkroege): We should probably throttle compositor frames.
-  client_->DidSwapBuffers();
   // OutputSurface owns WindowSurface, and so if OutputSurface is
   // destroyed then SubmitCompositorFrame's callback will never get called.
   // Thus, base::Unretained is safe here.
   surface_->SubmitCompositorFrame(
       std::move(frame),
       base::Bind(&OutputSurface::SwapBuffersComplete, base::Unretained(this)));
 }
 
 void OutputSurface::OnResourcesReturned(
     ui::WindowSurface* surface,
     mojo::Array<cc::ReturnedResource> resources) {
   cc::CompositorFrameAck cfa;
   cfa.resources = resources.To<cc::ReturnedResourceArray>();
   ReclaimResources(&cfa);
 }
 
 void OutputSurface::SwapBuffersComplete() {
   client_->DidSwapBuffersComplete();
 }
 
 }  // namespace ui