Add support for (de)serializing LayerSelectionBound.

cc/input/layer_selection_bound_unittest.cc

+// 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/input/layer_selection_bound.h"
+
+#include "cc/proto/layer_selection_bound.pb.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/geometry/point.h"
+
+namespace cc {
+namespace {
+
+void VerifySerializeAndDeserializeProto(const LayerSelectionBound& bound1) {
+  proto::LayerSelectionBound proto;
+  bound1.ToProtobuf(&proto);
+  LayerSelectionBound bound2;
+  bound2.FromProtobuf(proto);
+  EXPECT_EQ(bound1, bound2);
+}
+
+TEST(LayerSelectionBoundTest, AllTypePermutations) {
+  LayerSelectionBound bound;
+  bound.type = SelectionBoundType::SELECTION_BOUND_LEFT;
+  bound.edge_top = gfx::Point(3, 14);
+  bound.edge_bottom = gfx::Point(6, 28);
+  bound.layer_id = 42;
+  VerifySerializeAndDeserializeProto(bound);
+  bound.type = SelectionBoundType::SELECTION_BOUND_RIGHT;
+  VerifySerializeAndDeserializeProto(bound);
+  bound.type = SelectionBoundType::SELECTION_BOUND_CENTER;
+  VerifySerializeAndDeserializeProto(bound);
+  bound.type = SelectionBoundType::SELECTION_BOUND_EMPTY;
+  VerifySerializeAndDeserializeProto(bound);
+}
+
+}  // namespace
+}  // namespace cc