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

sky/compositor/surface_allocator.cc

-// Copyright 2014 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/surface_allocator.h"
-
-#include "base/logging.h"
-
-namespace sky {
-
-SurfaceAllocator::SurfaceAllocator(uint32_t id_namespace)
-    : id_namespace_(id_namespace), next_id_(1) {
-  DCHECK(id_namespace);
-}
-
-SurfaceAllocator::~SurfaceAllocator() {
-}
-
-mojo::SurfaceIdPtr SurfaceAllocator::CreateSurfaceId() {
-  auto id = mojo::SurfaceId::New();
-  id->local = next_id_++;
-  id->id_namespace = id_namespace_;
-  return id.Pass();
-}
-
-}  // namespace sky