cc: Add scaling for checkered images.

cc/tiles/tile_manager.cc

Index: cc/tiles/tile_manager.cc
diff --git a/cc/tiles/tile_manager.cc b/cc/tiles/tile_manager.cc
index 4db308b1167ff76b660843dcc0e51a239d372f5e..e2d11552268c562607b140c1b0349d73670a49a1 100644
--- a/cc/tiles/tile_manager.cc
+++ b/cc/tiles/tile_manager.cc
@@ -864,8 +864,7 @@ void TileManager::PartitionImagesForCheckering(
   WhichTree tree = tile->tiling()->tree();
 
   for (auto& draw_image : images_in_tile) {
-    if (checker_image_tracker_.ShouldCheckerImage(draw_image.paint_image(),
-                                                  tree))
+    if (checker_image_tracker_.ShouldCheckerImage(draw_image, tree))
       checkered_images->push_back(draw_image.paint_image());
     else
       sync_decoded_images->push_back(draw_image);
@@ -884,8 +883,7 @@ void TileManager::AddCheckeredImagesToDecodeQueue(
   WhichTree tree = tile->tiling()->tree();
 
   for (auto& draw_image : images_in_tile) {
-    if (checker_image_tracker_.ShouldCheckerImage(draw_image.paint_image(),
-                                                  tree))
+    if (checker_image_tracker_.ShouldCheckerImage(draw_image, tree))
       image_decode_queue->push_back(draw_image.paint_image());
   }
 }