cc: Make OutputSurface::SwapBuffers pure virtual

content/test/web_layer_tree_view_impl_for_testing.cc

 // Copyright 2013 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 "content/test/web_layer_tree_view_impl_for_testing.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/synchronization/lock.h"
 #include "cc/base/switches.h"
 #include "cc/blink/web_layer_impl.h"
 #include "cc/input/input_handler.h"
 #include "cc/layers/layer.h"
-#include "cc/output/output_surface.h"
+#include "cc/test/pixel_test_output_surface.h"
 #include "cc/test/test_context_provider.h"
 #include "cc/trees/layer_tree_host.h"
 #include "content/test/test_blink_web_unit_test_support.h"
 #include "third_party/WebKit/public/platform/Platform.h"
 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
 #include "third_party/WebKit/public/platform/WebLayer.h"
 #include "third_party/WebKit/public/platform/WebLayerTreeView.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
 #include "ui/gfx/frame_time.h"
 
@@ skipping 119 matching lines @@
     float top_controls_delta) {}
 
 void WebLayerTreeViewImplForTesting::ApplyViewportDeltas(
     const gfx::Vector2d& scroll_delta,
     float page_scale,
     float top_controls_delta) {}
 
 void WebLayerTreeViewImplForTesting::RequestNewOutputSurface(
     bool fallback) {
   layer_tree_host_->SetOutputSurface(make_scoped_ptr(
-      new cc::OutputSurface(cc::TestContextProvider::Create())));
+      new cc::PixelTestOutputSurface(cc::TestContextProvider::Create())));
 }
 
 void WebLayerTreeViewImplForTesting::registerViewportLayers(
     const blink::WebLayer* pageScaleLayer,
     const blink::WebLayer* innerViewportScrollLayer,
     const blink::WebLayer* outerViewportScrollLayer) {
   layer_tree_host_->RegisterViewportLayers(
       static_cast<const cc_blink::WebLayerImpl*>(pageScaleLayer)->layer(),
       static_cast<const cc_blink::WebLayerImpl*>(innerViewportScrollLayer)
           ->layer(),
@@ skipping 12 matching lines @@
 
 void WebLayerTreeViewImplForTesting::registerSelection(
     const blink::WebSelectionBound& start,
     const blink::WebSelectionBound& end) {
 }
 
 void WebLayerTreeViewImplForTesting::clearSelection() {
 }
 
 }  // namespace content