Convert URLLoader to the new proxy design

content/renderer/pepper/renderer_ppapi_host_impl.h

Index: content/renderer/pepper/renderer_ppapi_host_impl.h
diff --git a/content/renderer/pepper/renderer_ppapi_host_impl.h b/content/renderer/pepper/renderer_ppapi_host_impl.h
index 4d3d0b4e193e5da32e0844823d55394f1366afd1..6417cae9f9cfb0cd5cf9ce0a703198b6e6d49a44 100644
--- a/content/renderer/pepper/renderer_ppapi_host_impl.h
+++ b/content/renderer/pepper/renderer_ppapi_host_impl.h
@@ -93,6 +93,7 @@ class RendererPpapiHostImpl
       PP_Instance instance) const OVERRIDE;
   virtual WebKit::WebPluginContainer* GetContainerForInstance(
       PP_Instance instance) const OVERRIDE;
+  virtual base::ProcessId GetPluginPID() const OVERRIDE;
   virtual bool HasUserGesture(PP_Instance instance) const OVERRIDE;
   virtual int GetRoutingIDForWidget(PP_Instance instance) const OVERRIDE;
   virtual gfx::Point PluginPointToRenderView(
@@ -121,7 +122,9 @@ class RendererPpapiHostImpl
 
   webkit::ppapi::PluginModule* module_;  // Non-owning pointer.
 
-  ppapi::proxy::HostDispatcher* dispatcher_;  // Non-owning pointer.
+  // The dispatcher we use to send messagse when the plugin is out-of-process.
+  // Will be null when running in-process. Non-owning pointer.
+  ppapi::proxy::HostDispatcher* dispatcher_;
 
   scoped_ptr<ppapi::host::PpapiHost> ppapi_host_;