cc: Make OutputSurface::BindToClient pure virtual and not return bool

content/browser/compositor/software_browser_compositor_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 "content/browser/compositor/software_browser_compositor_output_surface.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 18 matching lines @@
     : BrowserCompositorOutputSurface(std::move(software_device),
                                      vsync_manager,
                                      begin_frame_source),
       task_runner_(std::move(task_runner)),
       weak_factory_(this) {}
 
 SoftwareBrowserCompositorOutputSurface::
     ~SoftwareBrowserCompositorOutputSurface() {
 }
 
+void SoftwareBrowserCompositorOutputSurface::BindToClient(
+    cc::OutputSurfaceClient* client) {
+  DCHECK(client);
+  DCHECK(!client_);
+  client_ = client;
+}
+
 void SoftwareBrowserCompositorOutputSurface::EnsureBackbuffer() {
   software_device()->EnsureBackbuffer();
 }
 
 void SoftwareBrowserCompositorOutputSurface::DiscardBackbuffer() {
   software_device()->DiscardBackbuffer();
 }
 
 void SoftwareBrowserCompositorOutputSurface::BindFramebuffer() {
   // Not used for software surfaces.
   NOTREACHED();
 }
 
 void SoftwareBrowserCompositorOutputSurface::Reshape(
     const gfx::Size& size,
     float device_scale_factor,
     const gfx::ColorSpace& color_space,
     bool has_alpha) {
   software_device()->Resize(size, device_scale_factor);
 }
 
 void SoftwareBrowserCompositorOutputSurface::SwapBuffers(
     cc::OutputSurfaceFrame frame) {
+  DCHECK(client_);
   base::TimeTicks swap_time = base::TimeTicks::Now();
   for (auto& latency : frame.latency_info) {
     latency.AddLatencyNumberWithTimestamp(
         ui::INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT, 0, 0, swap_time, 1);
     latency.AddLatencyNumberWithTimestamp(
         ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 0, 0,
         swap_time, 1);
   }
   task_runner_->PostTask(FROM_HERE,
                          base::Bind(&RenderWidgetHostImpl::CompositorFrameDrawn,
@@ skipping 36 matching lines @@
   return 0;
 }
 
 #if defined(OS_MACOSX)
 void SoftwareBrowserCompositorOutputSurface::SetSurfaceSuspendedForRecycle(
     bool suspended) {
 }
 #endif
 
 }  // namespace content