cc: Remove separate x/y raster scales.

cc/test/fake_picture_layer_tiling_client.cc

Index: cc/test/fake_picture_layer_tiling_client.cc
diff --git a/cc/test/fake_picture_layer_tiling_client.cc b/cc/test/fake_picture_layer_tiling_client.cc
index b42c3063598b904d37b24c7a28851278ddea4e23..e4b3a32105d4c5285591b402ec7ed1da604231ff 100644
--- a/cc/test/fake_picture_layer_tiling_client.cc
+++ b/cc/test/fake_picture_layer_tiling_client.cc
@@ -66,8 +66,7 @@ FakePictureLayerTilingClient::GetPendingOrActiveTwinTiling(
   if (!twin_set_)
     return twin_tiling_;
   for (size_t i = 0; i < twin_set_->num_tilings(); ++i) {
-    if (twin_set_->tiling_at(i)->contents_scale_key() ==
-        tiling->contents_scale_key())
+    if (twin_set_->tiling_at(i)->contents_scale() == tiling->contents_scale())
       return twin_set_->tiling_at(i);
   }
   return nullptr;