Implement shareResources==true in TestWebGraphicsContext3D

cc/test/fake_layer_tree_host_client.cc

Index: cc/test/fake_layer_tree_host_client.cc
diff --git a/cc/test/fake_layer_tree_host_client.cc b/cc/test/fake_layer_tree_host_client.cc
index 26ae8abc176da525a3c5ecc4b0601228acb25fc4..0413b08718762f52b5a5218838e1b3801223b757 100644
--- a/cc/test/fake_layer_tree_host_client.cc
+++ b/cc/test/fake_layer_tree_host_client.cc
@@ -28,18 +28,10 @@ scoped_ptr<OutputSurface> FakeLayerTreeHostClient::CreateOutputSurface() {
         make_scoped_ptr(new SoftwareOutputDevice)).PassAs<OutputSurface>();
   }
 
-  WebKit::WebGraphicsContext3D::Attributes attrs;
-  if (use_delegating_renderer_) {
-    return FakeOutputSurface::CreateDelegating3d(
-        TestWebGraphicsContext3D::Create(attrs)
-            .PassAs<WebKit::WebGraphicsContext3D>())
-        .PassAs<OutputSurface>();
-  }
+  if (use_delegating_renderer_)
+    return FakeOutputSurface::CreateDelegating3d().PassAs<OutputSurface>();
 
-  return FakeOutputSurface::Create3d(
-      TestWebGraphicsContext3D::Create(attrs)
-          .PassAs<WebKit::WebGraphicsContext3D>())
-      .PassAs<OutputSurface>();
+  return CreateFakeOutputSurface();
 }
 
 scoped_refptr<cc::ContextProvider> FakeLayerTreeHostClient::