Move //sky/compositor to //sky/viewer/compositor

sky/compositor/rasterizer.cc

Index: sky/compositor/rasterizer.cc
diff --git a/sky/compositor/rasterizer.cc b/sky/compositor/rasterizer.cc
deleted file mode 100644
index e0eb2d5c189c617e86582c3b774a6fa35e23af65..0000000000000000000000000000000000000000
--- a/sky/compositor/rasterizer.cc
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "sky/compositor/rasterizer.h"
-
-namespace sky {
-
-Rasterizer::Rasterizer() {
-}
-
-Rasterizer::~Rasterizer() {
-}
-
-}  // namespace sky