Rasterize at maximum scale for scale animations on CPU-rasterized layers

cc/layers/image_layer.cc

Index: cc/layers/image_layer.cc
diff --git a/cc/layers/image_layer.cc b/cc/layers/image_layer.cc
index 562525bdda44fbf405724d1cc36368c40ee2a146..cada84df3ccb4a0ce63731db532f2e0cd1f08358 100644
--- a/cc/layers/image_layer.cc
+++ b/cc/layers/image_layer.cc
@@ -67,6 +67,7 @@ LayerUpdater* ImageLayer::Updater() const {
 void ImageLayer::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,