Hook up ui::Compositor to Display's BeginFrameSource

cc/surfaces/surface_display_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 "cc/surfaces/surface_display_output_surface.h"
 
 #include "base/bind.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/surfaces/display.h"
 #include "cc/surfaces/onscreen_display_client.h"
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_manager.h"
 
 namespace cc {
 
 SurfaceDisplayOutputSurface::SurfaceDisplayOutputSurface(
     SurfaceManager* surface_manager,
     SurfaceIdAllocator* allocator,
     scoped_refptr<ContextProvider> context_provider,
     scoped_refptr<ContextProvider> worker_context_provider)
     : OutputSurface(std::move(context_provider),
                     std::move(worker_context_provider)),
-      display_client_(NULL),
+      display_client_(nullptr),
       factory_(surface_manager, this),
       allocator_(allocator) {
   factory_.set_needs_sync_points(false);
   capabilities_.delegated_rendering = true;
   capabilities_.adjust_deadline_for_parent = true;
   capabilities_.can_force_reclaim_resources = true;
   // Display and SurfaceDisplayOutputSurface share a GL context, so sync
   // points aren't needed when passing resources between them.
   capabilities_.delegated_sync_points_required = false;
 }
 
 SurfaceDisplayOutputSurface::~SurfaceDisplayOutputSurface() {
   if (HasClient())
     DetachFromClient();
   if (!surface_id_.is_null()) {
     factory_.Destroy(surface_id_);
   }
 }
 
-void SurfaceDisplayOutputSurface::ReceivedVSyncParameters(
-    base::TimeTicks timebase,
-    base::TimeDelta interval) {
-  CommitVSyncParameters(timebase, interval);
-}
-
 void SurfaceDisplayOutputSurface::SwapBuffers(CompositorFrame* frame) {
   gfx::Size frame_size =
       frame->delegated_frame_data->render_pass_list.back()->output_rect.size();
   if (frame_size.IsEmpty() || frame_size != display_size_) {
     if (!surface_id_.is_null()) {
       factory_.Destroy(surface_id_);
     }
     surface_id_ = allocator_->GenerateId();
     factory_.Create(surface_id_);
     display_size_ = frame_size;
   }
   display_client_->display()->SetSurfaceId(surface_id_,
                                            frame->metadata.device_scale_factor);
 
   client_->DidSwapBuffers();
 
   std::unique_ptr<CompositorFrame> frame_copy(new CompositorFrame());
   frame->AssignTo(frame_copy.get());
   factory_.SubmitCompositorFrame(
       surface_id_, std::move(frame_copy),
       base::Bind(&SurfaceDisplayOutputSurface::SwapBuffersComplete,
                  base::Unretained(this)));
 }
 
 bool SurfaceDisplayOutputSurface::BindToClient(OutputSurfaceClient* client) {
   DCHECK(client);
   DCHECK(display_client_);
+  client_ = client;
   factory_.manager()->RegisterSurfaceFactoryClient(allocator_->id_namespace(),
                                                    this);
 
-  client_ = client;
   // Avoid initializing GL context here, as this should be sharing the
   // Display's context.
   return display_client_->Initialize();
 }
 
 void SurfaceDisplayOutputSurface::ForceReclaimResources() {
   if (!surface_id_.is_null())
     factory_.SubmitCompositorFrame(surface_id_, nullptr,
                                    SurfaceFactory::DrawCallback());
 }
@@ skipping 11 matching lines @@
 void SurfaceDisplayOutputSurface::ReturnResources(
     const ReturnedResourceArray& resources) {
   CompositorFrameAck ack;
   ack.resources = resources;
   if (client_)
     client_->ReclaimResources(&ack);
 }
 
 void SurfaceDisplayOutputSurface::SetBeginFrameSource(
     BeginFrameSource* begin_frame_source) {
-  // TODO(tansell): Hook this up.
+  DCHECK(client_);
+  client_->SetBeginFrameSource(begin_frame_source);
 }
 
 void SurfaceDisplayOutputSurface::SwapBuffersComplete(SurfaceDrawStatus drawn) {
   if (client_ && !display_client_->output_surface_lost())
     client_->DidSwapBuffersComplete();
 }
 
 }  // namespace cc