[#8] Pass gfx::Point by const ref.

cc/output/shader.cc

Index: cc/output/shader.cc
diff --git a/cc/output/shader.cc b/cc/output/shader.cc
index 1c7040e51399c60faa6e4c7d157f2c64747c3386..7f1bac7fd560999e7c649c97908f631b99d3f412 100644
--- a/cc/output/shader.cc
+++ b/cc/output/shader.cc
@@ -135,9 +135,9 @@ static std::string SetFragmentSamplerType(
 }  // namespace
 
 TexCoordPrecision TexCoordPrecisionRequired(GLES2Interface* context,
-                                            int *highp_threshold_cache,
+                                            int* highp_threshold_cache,
                                             int highp_threshold_min,
-                                            gfx::Point max_coordinate) {
+                                            const gfx::Point& max_coordinate) {
   return TexCoordPrecisionRequired(context,
                                    highp_threshold_cache, highp_threshold_min,
                                    max_coordinate.x(), max_coordinate.y());