cc: Remove separate x/y raster scales.

cc/playback/discardable_image_map_unittest.cc

Index: cc/playback/discardable_image_map_unittest.cc
diff --git a/cc/playback/discardable_image_map_unittest.cc b/cc/playback/discardable_image_map_unittest.cc
index 3a8d90be95e8cfcc270d992032a59a2f81575bd2..e56f1581dbc2802ed5d30fba36ba8b7bccc5113c 100644
--- a/cc/playback/discardable_image_map_unittest.cc
+++ b/cc/playback/discardable_image_map_unittest.cc
@@ -43,8 +43,7 @@ class DiscardableImageMapTest : public testing::Test {
       const DiscardableImageMap& image_map,
       const gfx::Rect& rect) {
     std::vector<DrawImage> draw_images;
-    image_map.GetDiscardableImagesInRect(rect, gfx::SizeF(1.f, 1.f),
-                                         &draw_images);
+    image_map.GetDiscardableImagesInRect(rect, 1.f, &draw_images);
 
     std::vector<size_t> indices;
     image_map.images_rtree_.Search(rect, &indices);