cc: Only make num_threads - 1 SkPicture clones.

cc/resources/image_raster_worker_pool.cc

 // Copyright 2013 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/resources/image_raster_worker_pool.h"
 
 #include "base/debug/trace_event.h"
 #include "base/values.h"
 #include "cc/debug/traced_value.h"
 #include "cc/resources/resource.h"
 #include "third_party/skia/include/core/SkBitmapDevice.h"
 
 namespace cc {
-namespace {
-
-class RasterTaskGraphRunner : public internal::TaskGraphRunner {
- public:
-  RasterTaskGraphRunner()
-      : internal::TaskGraphRunner(RasterWorkerPool::GetNumRasterThreads(),
-                                  "CompositorRaster") {}
-};
-base::LazyInstance<RasterTaskGraphRunner>::Leaky g_task_graph_runner =
-    LAZY_INSTANCE_INITIALIZER;
-
-}  // namespace
 
 // static
 scoped_ptr<RasterWorkerPool> ImageRasterWorkerPool::Create(
     ResourceProvider* resource_provider,
     ContextProvider* context_provider,
     unsigned texture_target) {
   return make_scoped_ptr<RasterWorkerPool>(
-      new ImageRasterWorkerPool(g_task_graph_runner.Pointer(),
+      new ImageRasterWorkerPool(GetTaskGraphRunner(),
                                 resource_provider,
                                 context_provider,
                                 texture_target));
 }
 
 ImageRasterWorkerPool::ImageRasterWorkerPool(
     internal::TaskGraphRunner* task_graph_runner,
     ResourceProvider* resource_provider,
     ContextProvider* context_provider,
     unsigned texture_target)
@@ skipping 149 matching lines @@
 
 scoped_ptr<base::Value> ImageRasterWorkerPool::StateAsValue() const {
   scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue);
 
   state->SetBoolean("tasks_required_for_activation_pending",
                     raster_tasks_required_for_activation_pending_);
   return state.PassAs<base::Value>();
 }
 
 }  // namespace cc