Break Sky's dependency on cc

sky/viewer/cc/web_external_bitmap_impl.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/viewer/cc/web_external_bitmap_impl.h"
-
-#include "base/memory/shared_memory.h"
-
-namespace sky_viewer_cc {
-
-namespace {
-
-SharedMemoryAllocationFunction g_memory_allocator;
-
-}  // namespace
-
-void SetSharedMemoryAllocationFunction(
-    SharedMemoryAllocationFunction allocator) {
-  g_memory_allocator = allocator;
-}
-
-WebExternalBitmapImpl::WebExternalBitmapImpl() {
-}
-
-WebExternalBitmapImpl::~WebExternalBitmapImpl() {
-}
-
-void WebExternalBitmapImpl::setSize(blink::WebSize size) {
-  if (size != size_) {
-    size_t byte_size = size.width * size.height * 4;
-    shared_memory_ = g_memory_allocator(byte_size);
-    if (shared_memory_)
-      shared_memory_->Map(byte_size);
-    size_ = size;
-  }
-}
-
-blink::WebSize WebExternalBitmapImpl::size() {
-  return size_;
-}
-
-uint8* WebExternalBitmapImpl::pixels() {
-  return static_cast<uint8*>(shared_memory_->memory());
-}
-
-}  // namespace sky_viewer_cc