cc: Remove unused arguments from CalculateContentsScale

cc/layers/contents_scaling_layer.h

Index: cc/layers/contents_scaling_layer.h
diff --git a/cc/layers/contents_scaling_layer.h b/cc/layers/contents_scaling_layer.h
index 3e959622d753b8fadfb0435ccc4482cd5a12c528..84780d25a6ed916074cb148486f549126a8a368c 100644
--- a/cc/layers/contents_scaling_layer.h
+++ b/cc/layers/contents_scaling_layer.h
@@ -15,10 +15,6 @@ namespace cc {
 class CC_EXPORT ContentsScalingLayer : public Layer {
  public:
   virtual void CalculateContentsScale(float ideal_contents_scale,
-                                      float device_scale_factor,
-                                      float page_scale_factor,
-                                      float maximum_animation_contents_scale,
-                                      bool animating_transform_to_screen,
                                       float* contents_scale_x,
                                       float* contents_scale_y,
                                       gfx::Size* content_bounds) OVERRIDE;