Revert of cc: Make LayerTreeTests use a DelegatingRenderer and Display.

services/ui/surfaces/display_compositor.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "services/ui/surfaces/display_compositor.h"
 
 #include "cc/output/copy_output_request.h"
 #include "cc/output/output_surface.h"
 #include "cc/output/renderer_settings.h"
 #include "cc/output/texture_mailbox_deleter.h"
@@ skipping 103 matching lines @@
 
 void DisplayCompositor::DisplayOutputSurfaceLost() {
   // TODO(fsamuel): This looks like it would crash if a frame was in flight and
   // will be submitted.
   display_.reset();
 }
 
 void DisplayCompositor::DisplaySetMemoryPolicy(
     const cc::ManagedMemoryPolicy& policy) {}
 
-void DisplayCompositor::DisplayWillDrawAndSwap(
-    bool will_draw_and_swap,
-    const cc::RenderPassList& render_passes) {
-  // This notification is not relevant to our client outside of tests.
-}
-
-void DisplayCompositor::DisplayDidDrawAndSwap() {
-  // This notification is not relevant to our client outside of tests. We
-  // unblock the client from the DrawCallback when the surface is going to
-  // be drawn.
-}
-
 }  // namespace ui