Pass gfx structs by const ref(gfx::Vector2D/F)

content/browser/android/overscroll_glow.cc

Index: content/browser/android/overscroll_glow.cc
diff --git a/content/browser/android/overscroll_glow.cc b/content/browser/android/overscroll_glow.cc
index 61ffc08b3ae2b73cbf66f2cbc11d09b7c893c4c6..6842becafa39893ffd696d041e0ceb22ff685c41 100644
--- a/content/browser/android/overscroll_glow.cc
+++ b/content/browser/android/overscroll_glow.cc
@@ -112,10 +112,10 @@ float OverscrollGlow::GetVisibleAlpha() const {
 }
 
 bool OverscrollGlow::OnOverscrolled(base::TimeTicks current_time,
-                                    gfx::Vector2dF accumulated_overscroll,
-                                    gfx::Vector2dF overscroll_delta,
-                                    gfx::Vector2dF velocity,
-                                    gfx::Vector2dF displacement) {
+          const gfx::Vector2dF& accumulated_overscroll,
+          gfx::Vector2dF overscroll_delta,
+          gfx::Vector2dF velocity,
+          const gfx::Vector2dF& displacement) {
   // The size of the glow determines the relative effect of the inputs; an
   // empty-sized effect is effectively disabled.
   if (viewport_size_.IsEmpty())