Pepper: Move FileRef to the "new" resource proxy.

content/browser/renderer_host/pepper/pepper_external_file_ref_backend.cc

Index: content/browser/renderer_host/pepper/pepper_external_file_ref_backend.cc
diff --git a/content/browser/renderer_host/pepper/pepper_external_file_ref_backend.cc b/content/browser/renderer_host/pepper/pepper_external_file_ref_backend.cc
index 27ba37dfcca0ddbda4168912d1448b634d1d7dac..096b908266f594e89177742608b5dded11a00047 100644
--- a/content/browser/renderer_host/pepper/pepper_external_file_ref_backend.cc
+++ b/content/browser/renderer_host/pepper/pepper_external_file_ref_backend.cc
@@ -90,21 +90,16 @@ int32_t PepperExternalFileRefBackend::GetAbsolutePath(
     ppapi::host::ReplyMessageContext reply_context) {
   host_->SendReply(reply_context,
       PpapiPluginMsg_FileRef_GetAbsolutePathReply(path_.AsUTF8Unsafe()));
-  return PP_OK;
+
+  // Use PP_OK_COMPLETIONPENDING instead of PP_OK since we've already sent our
+  // reply above.
+  return PP_OK_COMPLETIONPENDING;
 }
 
 fileapi::FileSystemURL PepperExternalFileRefBackend::GetFileSystemURL() const {
   return fileapi::FileSystemURL();
 }
 
-std::string PepperExternalFileRefBackend::GetFileSystemURLSpec() const {
-  return std::string();
-}
-
-base::FilePath PepperExternalFileRefBackend::GetExternalPath() const {
-  return path_;
-}
-
 int32_t PepperExternalFileRefBackend::CanRead() const {
   if (!ChildProcessSecurityPolicyImpl::GetInstance()->
           CanReadFile(render_process_id_, path_)) {