gdata: Move ownership of GDataCache to GDataSystemService

chrome/browser/chromeos/gdata/gdata_system_service.h

Index: chrome/browser/chromeos/gdata/gdata_system_service.h
diff --git a/chrome/browser/chromeos/gdata/gdata_system_service.h b/chrome/browser/chromeos/gdata/gdata_system_service.h
index b97b2d2cadc7745793771da9f718f75a89934d17..1b3fc1db50a54869372344c0c45e0172296b8006 100644
--- a/chrome/browser/chromeos/gdata/gdata_system_service.h
+++ b/chrome/browser/chromeos/gdata/gdata_system_service.h
@@ -31,6 +31,9 @@ class GDataSystemService : public ProfileKeyedService  {
   // Returns the documents service instance.
   DocumentsServiceInterface* docs_service() { return documents_service_.get(); }
 
+  // Returns the cache instance.
+  GDataCache* cache() { return cache_.get(); }
+
   // Returns the file system instance.
   GDataFileSystem* file_system() { return file_system_.get(); }
 
@@ -54,6 +57,8 @@ class GDataSystemService : public ProfileKeyedService  {
   friend class GDataSystemServiceFactory;
 
   Profile* profile_;
+  const base::SequencedWorkerPool::SequenceToken sequence_token_;
+  scoped_ptr<GDataCache> cache_;
   scoped_ptr<DocumentsServiceInterface> documents_service_;
   scoped_ptr<GDataFileSystem> file_system_;
   scoped_ptr<GDataUploader> uploader_;