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

content/browser/renderer_host/pepper/pepper_external_file_ref_backend.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/pepper/pepper_external_file_ref_backend.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util_proxy.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 72 matching lines @@
 int32_t PepperExternalFileRefBackend::ReadDirectoryEntries(
     ppapi::host::ReplyMessageContext context) {
   // This operation isn't supported for external filesystems.
   return PP_ERROR_NOACCESS;
 }
 
 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();
 }
 
@@ skipping 55 matching lines @@
         file_info, PP_FILESYSTEMTYPE_EXTERNAL, &pp_file_info);
   } else {
     memset(&pp_file_info, 0, sizeof(pp_file_info));
   }
 
   host_->SendReply(reply_context,
                    PpapiPluginMsg_FileRef_QueryReply(pp_file_info));
 }
 
 }  // namespace content