Switching to CompositorFrameSinkSupport in android_webview::SurfacesInstance

cc/surfaces/display_client.h

Index: cc/surfaces/display_client.h
diff --git a/cc/surfaces/display_client.h b/cc/surfaces/display_client.h
index 85dff1742da7a61d0b713283324c1730ab50e064..ff9bfda4bd690bb0bde43f152927049d16bcf39c 100644
--- a/cc/surfaces/display_client.h
+++ b/cc/surfaces/display_client.h
@@ -12,10 +12,10 @@ namespace cc {
 class DisplayClient {
  public:
   virtual ~DisplayClient() {}
-  virtual void DisplayOutputSurfaceLost() = 0;
+  virtual void DisplayOutputSurfaceLost() {}
   virtual void DisplayWillDrawAndSwap(bool will_draw_and_swap,
-                                      const RenderPassList& render_passes) = 0;
-  virtual void DisplayDidDrawAndSwap() = 0;
+                                      const RenderPassList& render_passes) {}
+  virtual void DisplayDidDrawAndSwap() {}
 };
 
 }  // namespace cc