cc: Move worker threads to content.

content/browser/renderer_host/compositor_impl_android.cc

 // Copyright (c) 2012 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/renderer_host/compositor_impl_android.h"
 
 #include <android/bitmap.h>
 #include <android/native_window_jni.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/bind.h"
 #include "base/cancelable_callback.h"
 #include "base/command_line.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/lock.h"
+#include "base/threading/simple_thread.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_checker.h"
 #include "cc/base/switches.h"
 #include "cc/input/input_handler.h"
 #include "cc/layers/layer.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/output_surface.h"
 #include "cc/output/output_surface_client.h"
+#include "cc/resources/task_graph_runner.h"
 #include "cc/scheduler/begin_frame_source.h"
 #include "cc/surfaces/onscreen_display_client.h"
 #include "cc/surfaces/surface_display_output_surface.h"
 #include "cc/surfaces/surface_id_allocator.h"
 #include "cc/surfaces/surface_manager.h"
 #include "cc/trees/layer_tree_host.h"
 #include "content/browser/android/child_process_launcher_android.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
 #include "content/browser/gpu/compositor_util.h"
@@ skipping 90 matching lines @@
 
 static bool g_initialized = false;
 
 bool g_use_surface_manager = false;
 base::LazyInstance<cc::SurfaceManager> g_surface_manager =
     LAZY_INSTANCE_INITIALIZER;
 
 
 int g_surface_id_namespace = 0;
 
+class SingleThreadTaskGraphRunner
+    : public cc::TaskGraphRunner,
+      public base::DelegateSimpleThread::Delegate {
+ public:
+  SingleThreadTaskGraphRunner() : worker_thread_(this, "CompositorWorker") {
+    worker_thread_.Start();
+  }
+
+  ~SingleThreadTaskGraphRunner() override {
+    Shutdown();
+    worker_thread_.Join();
+  }
+
+ private:
+  // Overridden from base::DelegateSimpleThread::Delegate:
+  void Run() override { cc::TaskGraphRunner::Run(); }
+
+  base::DelegateSimpleThread worker_thread_;
+};
+
+base::LazyInstance<SingleThreadTaskGraphRunner> g_task_graph_runner =
+    LAZY_INSTANCE_INITIALIZER;
+
 } // anonymous namespace
 
 // static
 Compositor* Compositor::Create(CompositorClient* client,
                                gfx::NativeWindow root_window) {
   return client ? new CompositorImpl(client, root_window) : NULL;
 }
 
 // static
 void Compositor::Initialize() {
@@ skipping 238 matching lines @@
 
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   settings.initial_debug_state.SetRecordRenderingStats(
       command_line->HasSwitch(cc::switches::kEnableGpuBenchmarking));
   settings.initial_debug_state.show_fps_counter =
       command_line->HasSwitch(cc::switches::kUIShowFPSCounter);
   // TODO(enne): Update this this compositor to use the scheduler.
   settings.single_thread_proxy_scheduler = false;
 
   host_ = cc::LayerTreeHost::CreateSingleThreaded(
-      this,
-      this,
-      HostSharedBitmapManager::current(),
-      BrowserGpuMemoryBufferManager::current(),
-      settings,
-      base::MessageLoopProxy::current(),
-      nullptr);
+      this, this, HostSharedBitmapManager::current(),
+      BrowserGpuMemoryBufferManager::current(), g_task_graph_runner.Pointer(),
+      settings, base::MessageLoopProxy::current(), nullptr);
   host_->SetRootLayer(root_layer_);
 
   host_->SetVisible(true);
   host_->SetLayerTreeHostClientReady();
   host_->SetViewportSize(size_);
   host_->set_has_transparent_background(has_transparent_background_);
   host_->SetDeviceScaleFactor(device_scale_factor_);
 
   if (needs_animate_)
     host_->SetNeedsAnimate();
@@ skipping 283 matching lines @@
 
 void CompositorImpl::SetNeedsAnimate() {
   needs_animate_ = true;
   if (!host_)
     return;
 
   host_->SetNeedsAnimate();
 }
 
 }  // namespace content