PPAPI: Add new PPB_FileRef.MakeDirectory to support exclusive operation

content/browser/renderer_host/pepper/pepper_internal_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_internal_file_ref_backend.h"
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/file_util.h"
@@ skipping 74 matching lines @@
 void PepperInternalFileRefBackend::DidFinish(
     ppapi::host::ReplyMessageContext context,
     const IPC::Message& msg,
     base::PlatformFileError error) {
   context.params.set_result(ppapi::PlatformFileErrorToPepperError(error));
   host_->SendReply(context, msg);
 }
 
 int32_t PepperInternalFileRefBackend::MakeDirectory(
     ppapi::host::ReplyMessageContext reply_context,
+    bool exclusive,
     bool make_ancestors) {
   if (!GetFileSystemURL().is_valid())
     return PP_ERROR_FAILED;
 
   GetFileSystemContext()->operation_runner()->CreateDirectory(
       GetFileSystemURL(),
-      false,
+      exclusive,
       make_ancestors,
       base::Bind(&PepperInternalFileRefBackend::DidFinish,
                  weak_factory_.GetWeakPtr(),
                  reply_context,
                  PpapiPluginMsg_FileRef_MakeDirectoryReply()));
   return PP_OK_COMPLETIONPENDING;
 }
 
 int32_t PepperInternalFileRefBackend::Touch(
     ppapi::host::ReplyMessageContext reply_context,
@@ skipping 179 matching lines @@
   ChildProcessSecurityPolicyImpl* policy =
       ChildProcessSecurityPolicyImpl::GetInstance();
   if (!policy->CanReadFileSystemFile(render_process_id_, url) ||
       !policy->CanWriteFileSystemFile(render_process_id_, url)) {
     return PP_ERROR_NOACCESS;
   }
   return PP_OK;
 }
 
 }  // namespace content