cc: Remove unneeded methods from OutputSurface.

cc/test/test_delegating_output_surface.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 "cc/test/test_delegating_output_surface.h"
 
 #include <stdint.h>
 #include <utility>
 
 #include "cc/output/begin_frame_args.h"
@@ skipping 176 matching lines @@
     const ReturnedResourceArray& resources) {
   client_->ReclaimResources(resources);
 }
 
 void TestDelegatingOutputSurface::SetBeginFrameSource(
     BeginFrameSource* begin_frame_source) {
   client_->SetBeginFrameSource(begin_frame_source);
 }
 
 void TestDelegatingOutputSurface::DisplayOutputSurfaceLost() {
-  DidLoseOutputSurface();
+  client_->DidLoseOutputSurface();
 }
 
 void TestDelegatingOutputSurface::DisplayWillDrawAndSwap(
     bool will_draw_and_swap,
     const RenderPassList& render_passes) {
   if (test_client_)
     test_client_->DisplayWillDrawAndSwap(will_draw_and_swap, render_passes);
 }
 
 void TestDelegatingOutputSurface::DisplayDidDrawAndSwap() {
   if (test_client_)
     test_client_->DisplayDidDrawAndSwap();
 }
 
 }  // namespace cc