Add RegisterMountPointProvider and TestMountPointProvider for testing

webkit/fileapi/isolated_mount_point_provider.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 "webkit/fileapi/isolated_mount_point_provider.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/file_path.h"
@@ skipping 102 matching lines @@
   std::string fsid;
   FilePath path;
   if (!isolated_context()->CrackIsolatedPath(virtual_path, &fsid, NULL, &path))
     return NULL;
   if (path.empty())
     return NULL;
   return new webkit_blob::LocalFileReader(
       context->file_task_runner(), path, offset, base::Time());
 }
 
+FileSystemQuotaUtil* IsolatedMountPointProvider::GetQuotaUtil() {
+  // No quota support.
+  return NULL;
+}
+
 IsolatedContext* IsolatedMountPointProvider::isolated_context() const {
   return IsolatedContext::GetInstance();
 }
 
 }  // namespace fileapi