Replacing WebUIBindings use of CPPBoundClass with v8::Extension.

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 db5696ef5821bc8bd93f23e49ce82fc5ce00b008..b630247fc1304ce07616353c6032b5e7a1e989de 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -69,6 +69,7 @@
 #include "content/renderer/render_process_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "content/renderer/renderer_webkitplatformsupport_impl.h"
+#include "content/renderer/web_ui_extension.h"
 #include "grit/content_resources.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_forwarding_message_filter.h"
@@ -262,6 +263,8 @@ void RenderThreadImpl::Init() {
 
   AddFilter(new IndexedDBMessageFilter);
 
+  RegisterExtension(content::WebUIExtension::Get());
+
   content::GetContentClient()->renderer()->RenderThreadStarted();
 
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();