PPAPI: Add new PPB_FileRef.MakeDirectory to support exclusive operation

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 15 matching lines @@
                                   weak_factory_(this) {
   task_runner_ =
       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE);
 }
 
 PepperExternalFileRefBackend::~PepperExternalFileRefBackend() {
 }
 
 int32_t PepperExternalFileRefBackend::MakeDirectory(
     ppapi::host::ReplyMessageContext reply_context,
+    bool exclusive,
     bool make_ancestors) {
   // This operation isn't supported for external filesystems.
   return PP_ERROR_NOACCESS;
 }
 
 int32_t PepperExternalFileRefBackend::Touch(
     ppapi::host::ReplyMessageContext reply_context,
     PP_Time last_access_time,
     PP_Time last_modified_time) {
   IPC::Message reply_msg = PpapiPluginMsg_FileRef_TouchReply();
@@ skipping 104 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