Index: cc/trees/layer_sorter.cc |
diff --git a/cc/trees/layer_sorter.cc b/cc/trees/layer_sorter.cc |
index 9287f19c05ac598b492d7d11db1133b627426e31..e171fe01120f6389931b1acb403581968e7126db 100644 |
--- a/cc/trees/layer_sorter.cc |
+++ b/cc/trees/layer_sorter.cc |
@@ -23,7 +23,8 @@ namespace cc { |
// the test scene went away. |
const float k_layer_epsilon = 1e-4f; |
-inline static float PerpProduct(gfx::Vector2dF u, gfx::Vector2dF v) { |
+inline static float PerpProduct(const gfx::Vector2dF& u, |
+ const gfx::Vector2dF& v) { |
return u.x() * v.y() - u.y() * v.x(); |
} |