Serialize PictureLayer properties.

cc/proto/layer.proto

 // 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.
 
 syntax = "proto2";
 
+import "display_list_recording_source.proto";
+import "size.proto";
+import "rect.proto";
+import "region.proto";
+
 package cc.proto;
 
 option optimize_for = LITE_RUNTIME;
 
 // Identifies the type of cc:Layer a LayerNode represents. It is used to
 // facilitate reconstruction of a Layer of the correct type on the client.
 enum LayerType {
-  Base = 1;
+  UNKNOWN = 0;
+  LAYER = 1;
+  PICTURE_LAYER = 2;
 
   // TODO(nyquist): Add the rest of the necessary LayerTypes.
 };
 
 // Hierarchical structure for serializing the Layer tree.
 message LayerNode {
   // required
   optional int32 id = 1;
   // required
   optional LayerType type = 2;
@@ skipping 15 matching lines @@
   optional int32 id = 1;
   // required
   optional bool needs_push_properties = 3;
   // required
   optional int32 num_dependents_need_push_properties = 4;
 
   // The properties below are only read if |needs_push_properties| is set.
   // The Layer base class and each descendant have different proto messages
   // for their specific properties.
   optional BaseLayerProperties base = 5;
+
+  // Only one of these fields may be set per LayerProperties.
+  // TODO(dtrainor): use a 'oneof' union when it's supported in Chromium.  See
+  // crbug.com/570371.
+  optional PictureLayerProperties picture = 6;
 }
 
 message BaseLayerProperties {
   // TODO(nyquist): Add all the required properties below. Huzzah!
 }
+
+message PictureLayerProperties {
+  optional DisplayListRecordingSource recording_source = 1;
+  optional Region invalidation = 2;
+  optional Rect last_updated_visible_layer_rect = 3;
+  optional bool is_mask = 4;
+  optional bool nearest_neighbor = 5;
+
+  optional int64 update_source_frame_number = 6;
+}