Implement missing safelyRun() on ThreadedRenderer

Change-Id: I14b75f37a13fabaa759a51369190dbdc84087c4b
diff --git a/libs/hwui/renderthread/RenderProxy.h b/libs/hwui/renderthread/RenderProxy.h
index 113c5a8..1ad0c2d 100644
--- a/libs/hwui/renderthread/RenderProxy.h
+++ b/libs/hwui/renderthread/RenderProxy.h
@@ -62,6 +62,8 @@
     ANDROID_API void attachFunctor(Functor* functor);
     ANDROID_API void detachFunctor(Functor* functor);
 
+    ANDROID_API void runWithGlContext(RenderTask* task);
+
 private:
     RenderThread& mRenderThread;
     CanvasContext* mContext;