Add the DelegatingRenderer class with its initialize path.

cc/test/fake_layer_tree_host_client.cc

 // Copyright 2012 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/fake_layer_tree_host_client.h"
 
 namespace cc {
 
 scoped_ptr<OutputSurface> FakeLayerImplTreeHostClient::createOutputSurface()
 {
     if (m_useSoftwareRendering) {
+        if (m_useDelegatingRenderer)
+            return FakeOutputSurface::CreateDelegatingSoftware(make_scoped_ptr(new FakeSoftwareOutputDevice).PassAs<SoftwareOutputDevice>()).PassAs<OutputSurface>();
+
         return FakeOutputSurface::CreateSoftware(make_scoped_ptr(new FakeSoftwareOutputDevice).PassAs<SoftwareOutputDevice>()).PassAs<OutputSurface>();
     }
 
     WebKit::WebGraphicsContext3D::Attributes attrs;
+    if (m_useDelegatingRenderer)
+        return FakeOutputSurface::CreateDelegating3d(WebKit::CompositorFakeWebGraphicsContext3D::create(attrs).PassAs<WebKit::WebGraphicsContext3D>()).PassAs<OutputSurface>();
+
     return FakeOutputSurface::Create3d(WebKit::CompositorFakeWebGraphicsContext3D::create(attrs).PassAs<WebKit::WebGraphicsContext3D>()).PassAs<OutputSurface>();
 }
 
 scoped_ptr<InputHandler> FakeLayerImplTreeHostClient::createInputHandler()
 {
     return scoped_ptr<InputHandler>();
 }
 
 scoped_ptr<FontAtlas> FakeLayerImplTreeHostClient::createFontAtlas()
 {
         return scoped_ptr<FontAtlas>();
 }
 
 }