Change chrome.filesystem to handle the Chrome OS Drive file entries directly.

chrome/browser/extensions/api/file_handlers/app_file_handler_util.cc

 // 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.
 
 #include "chrome/browser/extensions/api/file_handlers/app_file_handler_util.h"
 
 #include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "content/public/browser/child_process_security_policy.h"
@@ skipping 82 matching lines @@
     const std::string& extension_id,
     int renderer_id,
     const base::FilePath& path,
     bool writable) {
   GrantedFileEntry result;
   fileapi::IsolatedContext* isolated_context =
       fileapi::IsolatedContext::GetInstance();
   DCHECK(isolated_context);
 
   result.filesystem_id = isolated_context->RegisterFileSystemForPath(
-      fileapi::kFileSystemTypeNativeLocal, path, &result.registered_name);
+      fileapi::kFileSystemTypeNativeForPlatformApp, path,
+      &result.registered_name);
 
   content::ChildProcessSecurityPolicy* policy =
       content::ChildProcessSecurityPolicy::GetInstance();
   policy->GrantReadFileSystem(renderer_id, result.filesystem_id);
   if (writable)
     policy->GrantWriteFileSystem(renderer_id, result.filesystem_id);
 
   result.id = result.filesystem_id + ":" + result.registered_name;
 
   // We only need file level access for reading FileEntries. Saving FileEntries
   // just needs the file system to have read/write access, which is granted
   // above if required.
   if (!policy->CanReadFile(renderer_id, path))
     policy->GrantReadFile(renderer_id, path);
 
   ExtensionPrefs* prefs = extensions::ExtensionSystem::Get(profile)->
       extension_service()->extension_prefs();
   // Save this file entry in the prefs.
   prefs->AddSavedFileEntry(extension_id, result.id, path, writable);
 
   return result;
 }
 
 }  // namespace app_file_handler_util
 
 }  // namespace extensions