Modify test case to support streaming operation in sandbox file system.

webkit/browser/fileapi/file_system_context.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/browser/fileapi/file_system_context.h"
 
 #include "base/bind.h"
 #include "base/single_thread_task_runner.h"
 #include "base/stl_util.h"
 #include "base/task_runner_util.h"
@@ skipping 280 matching lines @@
 }
 
 const UpdateObserverList* FileSystemContext::GetUpdateObservers(
     FileSystemType type) const {
   FileSystemBackend* backend = GetFileSystemBackend(type);
   if (backend->GetQuotaUtil())
     return backend->GetQuotaUtil()->GetUpdateObservers(type);
   return NULL;
 }
 
+const ChangeObserverList* FileSystemContext::GetChangeObservers(
+    FileSystemType type) const {
+  FileSystemBackend* backend = GetFileSystemBackend(type);
+  if (backend->GetQuotaUtil())
+    return backend->GetQuotaUtil()->GetChangeObservers(type);
+  return NULL;
+}
+
 const AccessObserverList* FileSystemContext::GetAccessObservers(
     FileSystemType type) const {
   FileSystemBackend* backend = GetFileSystemBackend(type);
   if (backend->GetQuotaUtil())
     return backend->GetQuotaUtil()->GetAccessObservers(type);
   return NULL;
 }
 
 void FileSystemContext::GetFileSystemTypes(
     std::vector<FileSystemType>* types) const {
@@ skipping 316 matching lines @@
   } else if (parent != child) {
     bool result = parent.AppendRelativePath(child, &path);
     DCHECK(result);
   }
 
   operation_runner()->GetMetadata(
       url, base::Bind(&DidGetMetadataForResolveURL, path, callback, info));
 }
 
 }  // namespace storage