cc: Defer first OutputSurface creation until client is ready

cc/trees/layer_tree_host.cc

 // Copyright 2011 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/trees/layer_tree_host.h"
 
 #include <algorithm>
 #include <stack>
 #include <string>
 
@@ skipping 60 matching lines @@
 RendererCapabilities::~RendererCapabilities() {}
 
 scoped_ptr<LayerTreeHost> LayerTreeHost::CreateThreaded(
     LayerTreeHostClient* client,
     SharedBitmapManager* manager,
     const LayerTreeSettings& settings,
     scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner) {
   DCHECK(impl_task_runner);
   scoped_ptr<LayerTreeHost> layer_tree_host(
       new LayerTreeHost(client, manager, settings));
-  if (!layer_tree_host->InitializeThreaded(impl_task_runner))
-    return scoped_ptr<LayerTreeHost>();
+  layer_tree_host->InitializeThreaded(impl_task_runner);
   return layer_tree_host.Pass();
 }
 
 scoped_ptr<LayerTreeHost> LayerTreeHost::CreateSingleThreaded(
     LayerTreeHostClient* client,
     LayerTreeHostSingleThreadClient* single_thread_client,
     SharedBitmapManager* manager,
     const LayerTreeSettings& settings) {
   scoped_ptr<LayerTreeHost> layer_tree_host(
       new LayerTreeHost(client, manager, settings));
-  if (!layer_tree_host->InitializeSingleThreaded(single_thread_client))
-    return scoped_ptr<LayerTreeHost>();
+  layer_tree_host->InitializeSingleThreaded(single_thread_client);
   return layer_tree_host.Pass();
 }
 
 
 LayerTreeHost::LayerTreeHost(
     LayerTreeHostClient* client,
     SharedBitmapManager* manager,
     const LayerTreeSettings& settings)
     : micro_benchmark_controller_(this),
       next_ui_resource_id_(1),
@@ skipping 22 matching lines @@
       total_frames_used_for_lcd_text_metrics_(0),
       tree_id_(GetNextTreeId()),
       next_commit_forces_redraw_(false),
       shared_bitmap_manager_(manager) {
   if (settings_.accelerated_animation_enabled)
     animation_registrar_ = AnimationRegistrar::Create();
   rendering_stats_instrumentation_->set_record_rendering_stats(
       debug_state_.RecordRenderingStats());
 }
 
-bool LayerTreeHost::InitializeThreaded(
+void LayerTreeHost::InitializeThreaded(
     scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner) {
-  return InitializeProxy(ThreadProxy::Create(this, impl_task_runner));
+  InitializeProxy(ThreadProxy::Create(this, impl_task_runner));
 }
 
-bool LayerTreeHost::InitializeSingleThreaded(
+void LayerTreeHost::InitializeSingleThreaded(
     LayerTreeHostSingleThreadClient* single_thread_client) {
-    return InitializeProxy(
-        SingleThreadProxy::Create(this, single_thread_client));
+  InitializeProxy(SingleThreadProxy::Create(this, single_thread_client));
 }
 
-bool LayerTreeHost::InitializeForTesting(scoped_ptr<Proxy> proxy_for_testing) {
-  return InitializeProxy(proxy_for_testing.Pass());
+void LayerTreeHost::InitializeForTesting(scoped_ptr<Proxy> proxy_for_testing) {
+  InitializeProxy(proxy_for_testing.Pass());
 }
 
-bool LayerTreeHost::InitializeProxy(scoped_ptr<Proxy> proxy) {
+void LayerTreeHost::InitializeProxy(scoped_ptr<Proxy> proxy) {
   TRACE_EVENT0("cc", "LayerTreeHost::InitializeForReal");
 
-  scoped_ptr<OutputSurface> output_surface(CreateOutputSurface());
-  if (!output_surface)
-    return false;
-
   proxy_ = proxy.Pass();
-  proxy_->Start(output_surface.Pass());
-  return true;
+  proxy_->Start();
 }
 
 LayerTreeHost::~LayerTreeHost() {
   TRACE_EVENT0("cc", "LayerTreeHost::~LayerTreeHost");
 
   overhang_ui_resource_.reset();
 
   if (root_layer_.get())
     root_layer_->SetLayerTreeHost(NULL);
 
@@ skipping 1090 matching lines @@
 
 bool LayerTreeHost::ScheduleMicroBenchmark(
     const std::string& benchmark_name,
     scoped_ptr<base::Value> value,
     const MicroBenchmark::DoneCallback& callback) {
   return micro_benchmark_controller_.ScheduleRun(
       benchmark_name, value.Pass(), callback);
 }
 
 }  // namespace cc