Determine mask UVs based on texture size

cc/test/fake_picture_layer.cc

Index: cc/test/fake_picture_layer.cc
diff --git a/cc/test/fake_picture_layer.cc b/cc/test/fake_picture_layer.cc
index c8a8add6056fe4585fae1e4aa5f670ccea516c79..5e71a7981cdb74b3aaca4f323d6b383ef8012617 100644
--- a/cc/test/fake_picture_layer.cc
+++ b/cc/test/fake_picture_layer.cc
@@ -31,18 +31,27 @@ FakePictureLayer::~FakePictureLayer() {}
 
 std::unique_ptr<LayerImpl> FakePictureLayer::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
+  std::unique_ptr<FakePictureLayerImpl> layer_impl;
   switch (mask_type()) {
     case Layer::LayerMaskType::NOT_MASK:
-      return FakePictureLayerImpl::Create(tree_impl, id());
+      layer_impl = FakePictureLayerImpl::Create(tree_impl, id());
+      break;
     case Layer::LayerMaskType::MULTI_TEXTURE_MASK:
-      return FakePictureLayerImpl::CreateMask(tree_impl, id());
+      layer_impl = FakePictureLayerImpl::CreateMask(tree_impl, id());
+      break;
     case Layer::LayerMaskType::SINGLE_TEXTURE_MASK:
-      return FakePictureLayerImpl::CreateSingleTextureMask(tree_impl, id());
+      layer_impl =
+          FakePictureLayerImpl::CreateSingleTextureMask(tree_impl, id());
+      break;
     default:
       NOTREACHED();
       break;
   }
-  return nullptr;
+
+  if (!fixed_tile_size_.IsEmpty())
+    layer_impl->set_fixed_tile_size(fixed_tile_size_);
+
+  return std::move(layer_impl);
 }
 
 bool FakePictureLayer::Update() {