Add isWritableFileEntry to the fileSystem API

content/browser/child_process_security_policy_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_CHILD_PROCESS_SECURITY_POLICY_IMPL_H_
 #define CONTENT_BROWSER_CHILD_PROCESS_SECURITY_POLICY_IMPL_H_
 
 #pragma once
 
 #include <map>
@@ skipping 30 matching lines @@
   virtual void GrantReadFileSystem(
       int child_id,
       const std::string& filesystem_id) OVERRIDE;
   virtual void GrantReadWriteFileSystem(
       int child_id,
       const std::string& filesystem_id) OVERRIDE;
   virtual void GrantScheme(int child_id, const std::string& scheme) OVERRIDE;
   virtual bool CanReadFile(int child_id, const FilePath& file) OVERRIDE;
   virtual bool CanReadFileSystem(int child_id,
                                  const std::string& filesystem_id) OVERRIDE;
+  virtual bool CanReadWriteFileSystem(
+      int child_id,
+      const std::string& filesystem_id) OVERRIDE;
 
   // Pseudo schemes are treated differently than other schemes because they
   // cannot be requested like normal URLs.  There is no mechanism for revoking
   // pseudo schemes.
   void RegisterPseudoScheme(const std::string& scheme);
 
   // Returns true iff |scheme| has been registered as pseudo scheme.
   bool IsPseudoScheme(const std::string& scheme);
 
   // Returns true iff |scheme| is listed as a disabled scheme.
@@ skipping 138 matching lines @@
   SecurityStateMap security_state_;
 
   // This maps keeps the record of which js worker thread child process
   // corresponds to which main js thread child process.
   WorkerToMainProcessMap worker_map_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcessSecurityPolicyImpl);
 };
 
 #endif  // CONTENT_BROWSER_CHILD_PROCESS_SECURITY_POLICY_IMPL_H_