gdata: Move ownership of GDataCache to GDataSystemService

chrome/browser/chromeos/gdata/gdata_sync_client.h

Index: chrome/browser/chromeos/gdata/gdata_sync_client.h
diff --git a/chrome/browser/chromeos/gdata/gdata_sync_client.h b/chrome/browser/chromeos/gdata/gdata_sync_client.h
index 46a77b1606329d102b36d943fdadfde38ac89424..610170140e1a8f47d98f2024157e8ba32c18bfe9 100644
--- a/chrome/browser/chromeos/gdata/gdata_sync_client.h
+++ b/chrome/browser/chromeos/gdata/gdata_sync_client.h
@@ -62,7 +62,8 @@ class GDataSyncClient
   // |file_system| is used access the
   // cache (ex. store a file to the cache when the file is downloaded).
   GDataSyncClient(Profile* profile,
-                  GDataFileSystemInterface* file_system);
+                  GDataFileSystemInterface* file_system,
+                  GDataCache* cache);
   virtual ~GDataSyncClient();
 
   // GDataSyncClientInterface overrides.
@@ -127,7 +128,8 @@ class GDataSyncClient
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
   Profile* profile_;
-  GDataFileSystemInterface* file_system_;
+  GDataFileSystemInterface* file_system_;  // Owned by GDataSystemService.
+  GDataCache* cache_;  // Owned by GDataSystemService.
   scoped_ptr<PrefChangeRegistrar> registrar_;
 
   // The queue of resource IDs used to fetch pinned-but-not-fetched files in