Implement GetResourceListInDirectoryByWapi.

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 b605b5da3930518ac791fa2f16b6537cb0fb158e..741e16ea6215b3aff5c2ed5797e6cc1cadfa6c10 100644
--- a/chrome/browser/drive/gdata_wapi_service.h
+++ b/chrome/browser/drive/gdata_wapi_service.h
@@ -180,6 +180,12 @@ class GDataWapiService : public DriveServiceInterface,
       const std::string& resource_id,
       const std::string& app_id,
       const google_apis::AuthorizeAppCallback& callback) OVERRIDE;
+  virtual google_apis::CancelCallback GetResourceListInDirectoryByWapi(
+      const std::string& directory_resource_id,
+      const google_apis::GetResourceListCallback& callback) OVERRIDE;
+  virtual google_apis::CancelCallback GetRemainingResourceList(
+      const GURL& next_url,
+      const google_apis::GetResourceListCallback& callback) OVERRIDE;
 
  private:
   // AuthService::Observer override.