Move Pepper to using mailboxes

content/renderer/pepper/pepper_plugin_delegate_impl.cc

Index: content/renderer/pepper/pepper_plugin_delegate_impl.cc
diff --git a/content/renderer/pepper/pepper_plugin_delegate_impl.cc b/content/renderer/pepper/pepper_plugin_delegate_impl.cc
index 58408375dd3a403da128703afd4eaa02c45d5d34..0010a9c1ed0eea32e4165dc4e6ff2ae5afde9ef0 100644
--- a/content/renderer/pepper/pepper_plugin_delegate_impl.cc
+++ b/content/renderer/pepper/pepper_plugin_delegate_impl.cc
@@ -809,7 +809,6 @@ PepperPluginDelegateImpl::GetGraphics2D(
 
 webkit::ppapi::PluginDelegate::PlatformContext3D*
     PepperPluginDelegateImpl::CreateContext3D() {
-#ifdef ENABLE_GPU
   // If accelerated compositing of plugins is disabled, fail to create a 3D
   // context, because it won't be visible. This allows graceful fallback in the
   // modules.
@@ -817,15 +816,6 @@ webkit::ppapi::PluginDelegate::PlatformContext3D*
   if (!prefs.accelerated_compositing_for_plugins_enabled)
     return NULL;
   return new PlatformContext3DImpl;
-#else
-  return NULL;
-#endif
-}
-
-void PepperPluginDelegateImpl::ReparentContext(
-    webkit::ppapi::PluginDelegate::PlatformContext3D* context) {
-  static_cast<PlatformContext3DImpl*>(context)->
-      SetParentAndCreateBackingTextureIfNeeded();
 }
 
 webkit::ppapi::PluginDelegate::PlatformVideoCapture*