Support screen.lockOrientation() / screen.unlockOrientation() when running layout tests

content/renderer/renderer_webkitplatformsupport_impl.h

Index: content/renderer/renderer_webkitplatformsupport_impl.h
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.h b/content/renderer/renderer_webkitplatformsupport_impl.h
index 5e3ba6937dc066eeabf5b449d1dabf4deea6cd3f..ecbb1af11c305204bb0e235924fbde6310388ddf 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.h
+++ b/content/renderer/renderer_webkitplatformsupport_impl.h
@@ -180,6 +180,8 @@ class CONTENT_EXPORT RendererWebKitPlatformSupportImpl
   // Forces the screen orientation for testing purposes.
   static void SetMockScreenOrientationForTesting(
       blink::WebScreenOrientationType);
+  // Resets the mock screen orientation data used for testing.
+  static void ResetMockScreenOrientationForTesting();
 
   WebDatabaseObserverImpl* web_database_observer_impl() {
     return web_database_observer_impl_.get();