Remove non-leaky LazyInstances in cc.

cc/layers/empty_content_layer_client.cc

-// 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 "cc/layers/empty_content_layer_client.h"
-
-#include "cc/playback/display_item_list.h"
-#include "ui/gfx/geometry/rect.h"
-
-namespace cc {
-
-namespace {
-base::LazyInstance<EmptyContentLayerClient>::DestructorAtExit
-    g_empty_content_layer_client = LAZY_INSTANCE_INITIALIZER;
-}
-
-// static
-ContentLayerClient* EmptyContentLayerClient::GetInstance() {
-  return g_empty_content_layer_client.Pointer();
-}
-
-EmptyContentLayerClient::EmptyContentLayerClient() {}
-
-EmptyContentLayerClient::~EmptyContentLayerClient() {}
-
-gfx::Rect EmptyContentLayerClient::PaintableRegion() {
-  return gfx::Rect();
-}
-
-scoped_refptr<DisplayItemList>
-EmptyContentLayerClient::PaintContentsToDisplayList(
-    PaintingControlSetting painting_status) {
-  return make_scoped_refptr(new DisplayItemList);
-}
-
-bool EmptyContentLayerClient::FillsBoundsCompletely() const {
-  return false;
-}
-
-size_t EmptyContentLayerClient::GetApproximateUnsharedMemoryUsage() const {
-  return 0u;
-}
-
-}  // namespace cc