Remove implicit conversions from scoped_refptr to T* in cc/trees/

cc/trees/layer_tree_host_unittest_animation.cc

Index: cc/trees/layer_tree_host_unittest_animation.cc
diff --git a/cc/trees/layer_tree_host_unittest_animation.cc b/cc/trees/layer_tree_host_unittest_animation.cc
index 69e1e72f9752e5857c800745e620b0800e302080..fff628b1cb352c4fa098aad77114422b27216568 100644
--- a/cc/trees/layer_tree_host_unittest_animation.cc
+++ b/cc/trees/layer_tree_host_unittest_animation.cc
@@ -1164,7 +1164,7 @@ class LayerTreeHostAnimationTestAnimationsAddedToNewAndExistingLayers
       layer_tree_host()->root_layer()->AddChild(layer);
       layer->set_layer_animation_delegate(this);
       layer->SetBounds(gfx::Size(4, 4));
-      AddOpacityTransitionToLayer(layer, 1, 0.f, 0.5f, true);
+      AddOpacityTransitionToLayer(layer.get(), 1, 0.f, 0.5f, true);
     }
   }