Serialize PictureLayer properties.

cc/proto/layer.proto

Index: cc/proto/layer.proto
diff --git a/cc/proto/layer.proto b/cc/proto/layer.proto
index 914ff8a9247571b7c903c25903fcd50c3f6f93e6..69f7d9d9ff4f7ea66e006491ab8527ff6a222099 100644
--- a/cc/proto/layer.proto
+++ b/cc/proto/layer.proto
@@ -4,6 +4,11 @@
 
 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;
@@ -12,6 +17,7 @@ option optimize_for = LITE_RUNTIME;
 // facilitate reconstruction of a Layer of the correct type on the client.
 enum LayerType {
   Base = 1;
+  Picture = 2;

[vmpstr, 2015/12/16 04:21:08]

As I mentined elsewhere, maybe these should match the cc class name Layer,
PictureLayer, etc

[David Trainor- moved to gerrit, 2015/12/16 19:10:58]

Done.  Also moved to caps to fit chromium style guide and added UNKNOWN = 0,
which lets us inherently handle receiving layer types that the client doesn't
support.

 
   // TODO(nyquist): Add the rest of the necessary LayerTypes.
 };
@@ -47,8 +53,22 @@ message LayerProperties {
   // 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.

[vmpstr, 2015/12/16 04:21:08]

File a bug and reference it here please

[David Trainor- moved to gerrit, 2015/12/16 19:10:59]

Done.

+  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;
+}