Add create WGC3DInProcessCommandBuffer for on-screen context

cc/test/pixel_test.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 "cc/test/pixel_test.h"
 
 #include "base/path_service.h"
 #include "cc/output/compositor_frame_metadata.h"
 #include "cc/output/gl_renderer.h"
 #include "cc/output/output_surface.h"
@@ skipping 39 matching lines @@
   LayerTreeSettings settings_;
 };
 
 PixelTest::PixelTest() : device_viewport_size_(gfx::Size(200, 200)) {}
 
 PixelTest::~PixelTest() {}
 
 void PixelTest::SetUp() {
   CHECK(gfx::InitializeGLBindings(gfx::kGLImplementationOSMesaGL));
 
-  scoped_ptr<webkit::gpu::WebGraphicsContext3DInProcessCommandBufferImpl>
-      context3d(
-          new webkit::gpu::WebGraphicsContext3DInProcessCommandBufferImpl(
-              WebKit::WebGraphicsContext3D::Attributes()));
+  using webkit::gpu::WebGraphicsContext3DInProcessCommandBufferImpl;
+  scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl> context3d(
+      WebGraphicsContext3DInProcessCommandBufferImpl::CreateOffscreenContext(
+          WebKit::WebGraphicsContext3D::Attributes()));
   output_surface_.reset(new OutputSurface(
       context3d.PassAs<WebKit::WebGraphicsContext3D>()));
   resource_provider_ = ResourceProvider::Create(output_surface_.get(), 0);
   fake_client_ =
       make_scoped_ptr(new PixelTestRendererClient(device_viewport_size_));
   renderer_ = GLRenderer::Create(fake_client_.get(),
                                  output_surface_.get(),
                                  resource_provider_.get(),
                                  0);
 
@@ skipping 19 matching lines @@
   if (!PathService::Get(cc::DIR_TEST_DATA, &test_data_dir))
     return false;
 
   // To rebaseline:
   // return WritePNGFile(bitmap, test_data_dir.Append(ref_file));
 
   return MatchesPNGFile(bitmap, test_data_dir.Append(ref_file), comparator);
 }
 
 }  // namespace cc