Revert of cc: Remove use of PassAs() and constructor-casting with scoped_ptr.

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 287088725ac999d8da14b6bdd116b67f0e769bfd..be3606fae90efc8875a2131af8fc949771bd7bd8 100644
--- a/cc/test/layer_test_common.cc
+++ b/cc/test/layer_test_common.cc
@@ -112,7 +112,8 @@
       root_layer_impl_(LayerImpl::Create(host_->host_impl()->active_tree(), 1)),
       render_pass_(RenderPass::Create()) {
   scoped_ptr<FakeOutputSurface> output_surface = FakeOutputSurface::Create3d();
-  host_->host_impl()->InitializeRenderer(FakeOutputSurface::Create3d());
+  host_->host_impl()->InitializeRenderer(
+      output_surface.PassAs<OutputSurface>());
 }
 
 LayerTestCommon::LayerImplTest::~LayerImplTest() {}