[#4] Pass gfx structs by const ref (gfx::PointF)

cc/quads/texture_draw_quad.h

Index: cc/quads/texture_draw_quad.h
diff --git a/cc/quads/texture_draw_quad.h b/cc/quads/texture_draw_quad.h
index 510440745219506e9d477ffdb4409016fc6015c3..19b548341ef28a93d2b6a77fe6185920600f7996 100644
--- a/cc/quads/texture_draw_quad.h
+++ b/cc/quads/texture_draw_quad.h
@@ -21,8 +21,8 @@ class CC_EXPORT TextureDrawQuad : public DrawQuad {
               const gfx::Rect& opaque_rect,
               unsigned resource_id,
               bool premultiplied_alpha,
-              gfx::PointF uv_top_left,
-              gfx::PointF uv_bottom_right,
+              const gfx::PointF& uv_top_left,
+              const gfx::PointF& uv_bottom_right,
               SkColor background_color,
               const float vertex_opacity[4],
               bool flipped);
@@ -34,8 +34,8 @@ class CC_EXPORT TextureDrawQuad : public DrawQuad {
               bool needs_blending,
               unsigned resource_id,
               bool premultiplied_alpha,
-              gfx::PointF uv_top_left,
-              gfx::PointF uv_bottom_right,
+              const gfx::PointF& uv_top_left,
+              const gfx::PointF& uv_bottom_right,
               SkColor background_color,
               const float vertex_opacity[4],
               bool flipped);