Re-land: cc: Implement shared worker contexts.

cc/test/layer_test_common.cc

Index: cc/test/layer_test_common.cc
diff --git a/cc/test/layer_test_common.cc b/cc/test/layer_test_common.cc
index 7cb97cd51bc41e78f0d754886d67204728239cca..8ed49a2920cc99a98a6e7111c6e6f3d010e44a01 100644
--- a/cc/test/layer_test_common.cc
+++ b/cc/test/layer_test_common.cc
@@ -116,13 +116,13 @@ LayerTestCommon::LayerImplTest::LayerImplTest()
 
 LayerTestCommon::LayerImplTest::LayerImplTest(const LayerTreeSettings& settings)
     : client_(FakeLayerTreeHostClient::DIRECT_3D),
+      output_surface_(FakeOutputSurface::Create3d()),
       host_(FakeLayerTreeHost::Create(&client_, &task_graph_runner_, settings)),
       root_layer_impl_(LayerImpl::Create(host_->host_impl()->active_tree(), 1)),
       render_pass_(RenderPass::Create()),
       layer_impl_id_(2) {
   root_layer_impl_->SetHasRenderSurface(true);
-  scoped_ptr<FakeOutputSurface> output_surface = FakeOutputSurface::Create3d();
-  host_->host_impl()->InitializeRenderer(FakeOutputSurface::Create3d());
+  host_->host_impl()->InitializeRenderer(output_surface_.get());
 }
 
 LayerTestCommon::LayerImplTest::~LayerImplTest() {}