Add protobuf serialization to DisplayItemList

cc/playback/display_item_proto_factory.cc

Index: cc/playback/display_item_proto_factory.cc
diff --git a/cc/playback/display_item_proto_factory.cc b/cc/playback/display_item_proto_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a6002442fccb9c315685b97ce8cdddd154692600
--- /dev/null
+++ b/cc/playback/display_item_proto_factory.cc
@@ -0,0 +1,54 @@
+// 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/playback/display_item_proto_factory.h"
+
+#include "cc/playback/clip_display_item.h"
+#include "cc/playback/clip_path_display_item.h"
+#include "cc/playback/compositing_display_item.h"
+#include "cc/playback/drawing_display_item.h"
+#include "cc/playback/filter_display_item.h"
+#include "cc/playback/float_clip_display_item.h"
+#include "cc/playback/transform_display_item.h"
+#include "cc/proto/display_item.pb.h"
+
+namespace cc {
+
+// static
+DisplayItem* DisplayItemProtoFactory::AllocateAndConstruct(
+    scoped_refptr<DisplayItemList> list,
+    const proto::DisplayItem& proto) {
+  switch (proto.type()) {
+    case proto::DisplayItem::Type_Clip:
+      return list->CreateAndAppendItem<ClipDisplayItem>();
+    case proto::DisplayItem::Type_EndClip:
+      return list->CreateAndAppendItem<EndClipDisplayItem>();
+    case proto::DisplayItem::Type_ClipPath:
+      return list->CreateAndAppendItem<ClipPathDisplayItem>();
+    case proto::DisplayItem::Type_EndClipPath:
+      return list->CreateAndAppendItem<EndClipPathDisplayItem>();
+    case proto::DisplayItem::Type_Compositing:
+      return list->CreateAndAppendItem<CompositingDisplayItem>();
+    case proto::DisplayItem::Type_EndCompositing:
+      return list->CreateAndAppendItem<EndCompositingDisplayItem>();
+    case proto::DisplayItem::Type_Drawing:
+      return list->CreateAndAppendItem<DrawingDisplayItem>();
+    case proto::DisplayItem::Type_Filter:
+      return list->CreateAndAppendItem<FilterDisplayItem>();
+    case proto::DisplayItem::Type_EndFilter:
+      return list->CreateAndAppendItem<EndFilterDisplayItem>();
+    case proto::DisplayItem::Type_FloatClip:
+      return list->CreateAndAppendItem<FloatClipDisplayItem>();
+    case proto::DisplayItem::Type_EndFloatClip:
+      return list->CreateAndAppendItem<EndFloatClipDisplayItem>();
+    case proto::DisplayItem::Type_Transform:
+      return list->CreateAndAppendItem<TransformDisplayItem>();
+    case proto::DisplayItem::Type_EndTransform:
+      return list->CreateAndAppendItem<EndTransformDisplayItem>();
+    default:
+      return nullptr;
+  }
+}
+
+}  // namespace cc