[Drive] Add converter from ResourceEntry to FileResource

chrome/browser/drive/gdata_wapi_service.h

Index: chrome/browser/drive/gdata_wapi_service.h
diff --git a/chrome/browser/drive/gdata_wapi_service.h b/chrome/browser/drive/gdata_wapi_service.h
index d6ac8330b68b274253ed9abce2244cddd635dc2c..bd3845677d3f4717291f149bf5113983ecc280e6 100644
--- a/chrome/browser/drive/gdata_wapi_service.h
+++ b/chrome/browser/drive/gdata_wapi_service.h
@@ -26,6 +26,7 @@ class TaskRunner;
 }
 
 namespace google_apis {
+class FileResource;
 class RequestSender;
 }
 
@@ -57,6 +58,9 @@ class GDataWapiService : public DriveServiceInterface,
                    const std::string& custom_user_agent);
   virtual ~GDataWapiService();
 
+  static scoped_ptr<google_apis::FileResource>
+  ConvertResourceEntryToFileResource(const google_apis::ResourceEntry& entry);
+
   // DriveServiceInterface Overrides
   virtual void Initialize() OVERRIDE;
   virtual void AddObserver(DriveServiceObserver* observer) OVERRIDE;