Move output surface fallback from cc to embedders

content/test/web_layer_tree_view_impl_for_testing.h

Index: content/test/web_layer_tree_view_impl_for_testing.h
diff --git a/content/test/web_layer_tree_view_impl_for_testing.h b/content/test/web_layer_tree_view_impl_for_testing.h
index 6eec0462508a71eb824ed9e0cd7b15b458845ab5..ce628cb03781999e8732bc2cbb02ceb12fb9bf7a 100644
--- a/content/test/web_layer_tree_view_impl_for_testing.h
+++ b/content/test/web_layer_tree_view_impl_for_testing.h
@@ -77,8 +77,9 @@ class WebLayerTreeViewImplForTesting
   void ApplyViewportDeltas(const gfx::Vector2d& scroll_delta,
                            float page_scale,
                            float top_controls_delta) override;
-  void RequestNewOutputSurface(bool fallback) override;
+  void RequestNewOutputSurface() override;
   void DidInitializeOutputSurface() override {}
+  void DidFailToInitializeOutputSurface() override;
   void WillCommit() override {}
   void DidCommit() override {}
   void DidCommitAndDrawFrame() override {}