Change RenderThread to use ScopedCOMInitializer to initialize COM.

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
===================================================================
--- content/renderer/render_thread_impl.h	(revision 107682)
+++ content/renderer/render_thread_impl.h	(working copy)
@@ -56,7 +56,10 @@
 namespace base {
 class MessageLoopProxy;
 class Thread;
+namespace win {
+class ScopedCOMInitializer;
 }
+}
 
 namespace content {
 class RenderProcessObserver;
@@ -210,6 +213,9 @@
   // Used on multiple script execution context threads.
   scoped_ptr<WebDatabaseObserverImpl> web_database_observer_impl_;
 
+  // Initialize COM when using plugins outside the sandbox (Windows only).
+  scoped_ptr<base::win::ScopedCOMInitializer> initialize_com_;
+
   // If true, then a GetPlugins call is allowed to rescan the disk.
   bool plugin_refresh_allowed_;