Add Protobuf support in cc for gfx objects

Add protobuf serialization to the following:
- gfx::Point
- gfx::PointF
- gfx::Rect
- gfx::RectF
- gfx::Size
- gfx::SizeF
- gfx::Transform

Add a helper class to handle serialization and deserialization.  Add
unit tests as well.

BUG=541321
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1394353002

Cr-Commit-Position: refs/heads/master@{#354846}

1 files changed, 17 insertions, 0 deletions

diff --git a/cc/proto/rectf.proto b/cc/proto/rectf.proto
new file mode 100644
index 0000000..5bd56f1
--- /dev/null
+++ b/cc/proto/rectf.proto
@@ -0,0 +1,17 @@
+// 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 "pointf.proto";
+import "sizef.proto";
+
+option optimize_for = LITE_RUNTIME;
+
+package cc.proto;
+
+message RectF {
+  optional cc.proto.PointF origin = 1;
+  optional cc.proto.SizeF size = 2;
+}