compositor-worker: Refactor CompositorWorkerManager

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 3b17ea0d15a56e5544b8bd2492366bfa42f917d4..f6c681c1e46646052e69a52c633d68cebe411fd1 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -39,7 +39,9 @@
 #include "cc/blink/web_layer_impl.h"
 #include "cc/layers/layer_settings.h"
 #include "cc/raster/task_graph_runner.h"
+#include "cc/trees/layer_tree_host_common.h"
 #include "cc/trees/layer_tree_settings.h"
+#include "components/scheduler/child/webthread_base.h"
 #include "components/scheduler/renderer/renderer_scheduler.h"
 #include "content/child/appcache/appcache_dispatcher.h"
 #include "content/child/appcache/appcache_frontend_impl.h"
@@ -1086,14 +1088,11 @@ void RenderThreadImpl::EnsureWebKitInitialized() {
           sync_compositor_factory->GetCompositorTaskRunner();
     }
 #endif
-    if (!compositor_task_runner_) {
-      compositor_thread_.reset(new base::Thread("Compositor"));
-      base::Thread::Options compositor_thread_options;
-#if defined(OS_ANDROID)
-      compositor_thread_options.priority = base::ThreadPriority::DISPLAY;
-#endif
-      compositor_thread_->StartWithOptions(compositor_thread_options);
-      compositor_task_runner_ = compositor_thread_->task_runner();
+    if (!compositor_task_runner_.get()) {
+      compositor_thread_.reset(
+          blink_platform_impl_->createThreadForCompositor("Compositor"));
+      compositor_task_runner_ = static_cast<scheduler::WebThreadBase*>(
+          compositor_thread_.get())->TaskRunner();
       compositor_task_runner_->PostTask(
           FROM_HERE,
           base::Bind(base::IgnoreResult(&ThreadRestrictions::SetIOAllowed),