Move output surface fallback from cc to embedders

content/test/web_layer_tree_view_impl_for_testing.cc

Index: content/test/web_layer_tree_view_impl_for_testing.cc
diff --git a/content/test/web_layer_tree_view_impl_for_testing.cc b/content/test/web_layer_tree_view_impl_for_testing.cc
index 17c05853c8dacd9ce1e5515fe6e75f2458593628..2a3fcf9a57e24de7201dd41116417d851762211c 100644
--- a/content/test/web_layer_tree_view_impl_for_testing.cc
+++ b/content/test/web_layer_tree_view_impl_for_testing.cc
@@ -155,14 +155,17 @@ void WebLayerTreeViewImplForTesting::ApplyViewportDeltas(
     float page_scale,
     float top_controls_delta) {}
 
-void WebLayerTreeViewImplForTesting::RequestNewOutputSurface(
-    bool fallback) {
+void WebLayerTreeViewImplForTesting::RequestNewOutputSurface() {
   bool flipped_output_surface = false;
   layer_tree_host_->SetOutputSurface(
       make_scoped_ptr(new cc::PixelTestOutputSurface(
           cc::TestContextProvider::Create(), flipped_output_surface)));
 }
 
+void WebLayerTreeViewImplForTesting::DidFailToInitializeOutputSurface() {
+  RequestNewOutputSurface();
+}
+
 void WebLayerTreeViewImplForTesting::registerViewportLayers(
     const blink::WebLayer* overscrollElasticityLayer,
     const blink::WebLayer* pageScaleLayer,