Make a global enum to differentiate impl & proxy.

ppapi/shared_impl/ppb_url_request_info_shared.h

Index: ppapi/shared_impl/ppb_url_request_info_shared.h
diff --git a/ppapi/shared_impl/ppb_url_request_info_shared.h b/ppapi/shared_impl/ppb_url_request_info_shared.h
index c07b9c98b487dbc3f2f0229f1050122ae09e4399..d779c0b9c330d397fa5b0e521392f099baf6ab37 100644
--- a/ppapi/shared_impl/ppb_url_request_info_shared.h
+++ b/ppapi/shared_impl/ppb_url_request_info_shared.h
@@ -90,11 +90,9 @@ class PPAPI_SHARED_EXPORT PPB_URLRequestInfo_Shared
     : public ::ppapi::Resource,
       public ::ppapi::thunk::PPB_URLRequestInfo_API {
  public:
-  // This constructor initializes the object as a proxy object with the given
-  // host resource.
-  PPB_URLRequestInfo_Shared(const HostResource& host_resource,
-                     const PPB_URLRequestInfo_Data& data);
-
+  PPB_URLRequestInfo_Shared(ResourceObjectType type,
+                            PP_Instance instance,
+                            const PPB_URLRequestInfo_Data& data);
   ~PPB_URLRequestInfo_Shared();
 
   // Resource overrides.