chromeos: Stop calling gdata::GDataCache::GetCacheEntry on UI thread

chrome/browser/chromeos/gdata/gdata_cache.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_GDATA_GDATA_CACHE_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_CACHE_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 50 matching lines @@
   };
 
   // Enum defining type of file operation e.g. copy or move, etc.
   enum FileOperationType {
     FILE_OPERATION_MOVE = 0,
     FILE_OPERATION_COPY,
   };
 
   // Structure to store information of an existing cache file.
   struct CacheEntry {
+    CacheEntry() : sub_dir_type(CACHE_TYPE_META),
+                   cache_state(0) {}
+
     CacheEntry(const std::string& md5,
                CacheSubDirectoryType sub_dir_type,
                int cache_state)
     : md5(md5),
       sub_dir_type(sub_dir_type),
       cache_state(cache_state) {
     }
 
     bool IsPresent() const { return IsCachePresent(cache_state); }
     bool IsPinned() const { return IsCachePinned(cache_state); }
@@ skipping 245 matching lines @@
 };
 
 // Sets the free disk space getter for testing.
 // The existing getter is deleted.
 void SetFreeDiskSpaceGetterForTesting(
     FreeDiskSpaceGetterInterface* getter);
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_CACHE_H_