cc/blimp: Add (de)-serialization for PictureLayer and ScrollbarLayer.

cc/blimp/deserialized_content_layer_client.cc

+// Copyright 2016 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/blimp/deserialized_content_layer_client.h"
+
+namespace cc {
+
+DeserializedContentLayerClient::DeserializedContentLayerClient() = default;
+
+DeserializedContentLayerClient::~DeserializedContentLayerClient() = default;
+
+void DeserializedContentLayerClient::UpdateDisplayListAndRecordedViewport(
+    scoped_refptr<DisplayItemList> display_list,
+    gfx::Rect recorded_viewport) {
+  display_list_ = std::move(display_list);
+  recorded_viewport_ = recorded_viewport;
+}
+
+gfx::Rect DeserializedContentLayerClient::PaintableRegion() {
+  return recorded_viewport_;
+}
+
+scoped_refptr<DisplayItemList>
+DeserializedContentLayerClient::PaintContentsToDisplayList(
+    PaintingControlSetting painting_status) {
+  return display_list_;
+}
+
+bool DeserializedContentLayerClient::FillsBoundsCompletely() const {
+  return false;
+}
+
+size_t DeserializedContentLayerClient::GetApproximateUnsharedMemoryUsage()
+    const {
+  return 0;
+}
+
+}  // namespace cc