Added logic that will return the result of the first chunk of root feed and continue fetching the r…

chrome/browser/chromeos/gdata/gdata_files.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/chromeos/gdata/gdata_files.h"
 
 #include <vector>
 
 #include "base/utf_string_conversions.h"
 #include "base/platform_file.h"
@@ skipping 335 matching lines @@
                             md5.c_str(),
                             CacheSubDirectoryTypeToString(sub_dir_type).c_str(),
                             JoinString(cache_states, ',').c_str());
 }
 
 // GDataRootDirectory class implementation.
 
 GDataRootDirectory::GDataRootDirectory(GDataFileSystem* file_system)
     : ALLOW_THIS_IN_INITIALIZER_LIST(GDataDirectory(NULL, this)),
       file_system_(file_system) {
-  DCHECK(file_system_);
 }
 
 GDataRootDirectory::~GDataRootDirectory() {
   STLDeleteValues(&cache_map_);
   cache_map_.clear();
 
   resource_map_.clear();
 }
 
 GDataRootDirectory* GDataRootDirectory::AsGDataRootDirectory() {
@@ skipping 119 matching lines @@
   DVLOG(1) << "Found entry for res_id=" << resource_id
            << ", " << entry->ToString();
 
   return entry;
 }
 
 void GDataRootDirectory::GetCacheState(
     const std::string& resource_id,
     const std::string& md5,
     const GetCacheStateCallback& callback) {
-  file_system_->GetCacheState(resource_id, md5, callback);
+  if (file_system_)
+    file_system_->GetCacheState(resource_id, md5, callback);
 }
 
 }  // namespace gdata