Change media galleries to external file system type to add toURL support

chrome/browser/extensions/api/media_galleries/media_galleries_api.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.
 
 // Implements the Chrome Extensions Media Galleries API.
 
 #include "chrome/browser/extensions/api/media_galleries/media_galleries_api.h"
 
 #include <set>
 #include <string>
@@ skipping 158 matching lines @@
         kIsAvailableKey, true);
 
     list->Append(file_system_dict_value.release());
 
     if (filesystems[i].path.empty())
       continue;
 
     if (has_read_permission) {
       content::ChildProcessSecurityPolicy* policy =
           content::ChildProcessSecurityPolicy::GetInstance();
-      policy->GrantReadFileSystem(child_id, filesystems[i].fsid);
+      policy->GrantReadFile(child_id, filesystems[i].path);
       if (has_delete_permission) {
-        policy->GrantDeleteFromFileSystem(child_id, filesystems[i].fsid);
+        policy->GrantDeleteFrom(child_id, filesystems[i].path);
         if (has_copy_to_permission) {
-          policy->GrantCopyIntoFileSystem(child_id, filesystems[i].fsid);
+          policy->GrantCopyInto(child_id, filesystems[i].path);
         }
       }
     }
   }
 
   return list.release();
 }
 
 bool CheckScanPermission(const extensions::Extension* extension,
                          std::string* error) {
@@ skipping 641 matching lines @@
   if (!parse_success) {
     SendResponse(false);
     return;
   }
 
   SetResult(metadata_dictionary->DeepCopy());
   SendResponse(true);
 }
 
 }  // namespace extensions