Initialize and set compositor thread in WebKit initialization

content/renderer/render_thread.cc

Index: content/renderer/render_thread.cc
diff --git a/content/renderer/render_thread.cc b/content/renderer/render_thread.cc
index 53332b98e5919fcf17220ede39c4245435a97206..fdfa4e899e0a7614d544e1f267f69e848b06f2e3 100644
--- a/content/renderer/render_thread.cc
+++ b/content/renderer/render_thread.cc
@@ -64,12 +64,17 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebScriptController.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebStorageEventDispatcher.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebString.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebThread.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 #include "ui/base/ui_base_switches.h"
 #include "v8/include/v8.h"
 #include "webkit/extensions/v8/playback_extension.h"
 #include "webkit/glue/webkit_glue.h"
 
+#ifdef HAVE_WEBCOMPOSITOR
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositor.h"
+#endif
+
 // TODO(port)
 #if defined(OS_WIN)
 #include "content/common/child_process_messages.h"
@@ -438,6 +443,12 @@ void RenderThread::EnsureWebKitInitialized() {
   webkit_platform_support_.reset(new RendererWebKitPlatformSupportImpl);
   WebKit::initialize(webkit_platform_support_.get());
 
+#ifdef HAVE_WEBCOMPOSITOR
+  compositor_thread_.reset(
+      webkit_platform_support_->createThread("Compositor"));

[jam, 2011/09/30 02:50:58]

nit: it's a little odd that the webkit embedder calls webkit just so that it can
call the embedder back. why not just include webthread_impl.h directly?

+  WebKit::WebCompositor::setThread(compositor_thread_.get());
+#endif
+
   WebScriptController::enableV8SingleThreadMode();
 
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();