cc: Don't pass simple well-defined classes by reference.

cc/trees/layer_tree_host_unittest_occlusion.cc

Index: cc/trees/layer_tree_host_unittest_occlusion.cc
diff --git a/cc/trees/layer_tree_host_unittest_occlusion.cc b/cc/trees/layer_tree_host_unittest_occlusion.cc
index a838e9dc78106c13417117fa1e87acab53a9b2cd..ea32a9e338b75d44f18510ab159f3d4c50f0d767 100644
--- a/cc/trees/layer_tree_host_unittest_occlusion.cc
+++ b/cc/trees/layer_tree_host_unittest_occlusion.cc
@@ -81,9 +81,12 @@ class LayerTreeHostOcclusionTest : public LayerTreeTest {
     }
   }
 
-  void SetLayerPropertiesForTesting(
-      TestLayer* layer, TestLayer* parent, const gfx::Transform& transform,
-      const gfx::PointF& position, const gfx::Size& bounds, bool opaque) const {
+  void SetLayerPropertiesForTesting(TestLayer* layer,
+                                    TestLayer* parent,
+                                    const gfx::Transform& transform,
+                                    gfx::PointF position,
+                                    gfx::Size bounds,
+                                    bool opaque) const {
     layer->RemoveAllChildren();
     if (parent)
       parent->AddChild(layer);