Add support for (de)serializing LayerSelectionBound.

cc/input/layer_selection_bound.cc

Index: cc/input/layer_selection_bound.cc
diff --git a/cc/input/layer_selection_bound.cc b/cc/input/layer_selection_bound.cc
index 2761e9e2b43aa1bceed58da58b1f53c7c0e01fcf..9fcee2b4f01dc611035936a47996dc9a6118a29a 100644
--- a/cc/input/layer_selection_bound.cc
+++ b/cc/input/layer_selection_bound.cc
@@ -2,9 +2,49 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/logging.h"
 #include "cc/input/layer_selection_bound.h"
+#include "cc/proto/gfx_conversions.h"
+#include "cc/proto/layer_selection_bound.pb.h"
 
 namespace cc {
+namespace {
+
+proto::SelectionBoundType SelectionBoundTypeToProtobuf(
+    const SelectionBoundType& type) {
+  switch (type) {
+    case SELECTION_BOUND_LEFT:
+      return proto::SelectionBoundType::LEFT;
+    case SELECTION_BOUND_RIGHT:
+      return proto::SelectionBoundType::RIGHT;
+    case SELECTION_BOUND_CENTER:
+      return proto::SelectionBoundType::CENTER;
+    case SELECTION_BOUND_EMPTY:
+      return proto::SelectionBoundType::EMPTY;
+  }
+  NOTREACHED() << "proto::SelectionBoundType::UNKNOWN";
+  return proto::SelectionBoundType::UNKNOWN;
+}
+
+SelectionBoundType SelectionBoundTypeFromProtobuf(
+    const proto::SelectionBoundType& type) {
+  switch (type) {
+    case proto::SelectionBoundType::LEFT:
+      return SELECTION_BOUND_LEFT;
+    case proto::SelectionBoundType::RIGHT:
+      return SELECTION_BOUND_RIGHT;
+    case proto::SelectionBoundType::CENTER:
+      return SELECTION_BOUND_CENTER;
+    case proto::SelectionBoundType::EMPTY:
+      return SELECTION_BOUND_EMPTY;
+    case proto::SelectionBoundType::UNKNOWN:
+      NOTREACHED() << "proto::SelectionBoundType::UNKNOWN";
+      return SELECTION_BOUND_EMPTY;
+  }
+  return SELECTION_BOUND_EMPTY;
+}
+
+}  // namespace
 
 LayerSelectionBound::LayerSelectionBound()
     : type(SELECTION_BOUND_EMPTY), layer_id(0) {
@@ -13,6 +53,21 @@ LayerSelectionBound::LayerSelectionBound()
 LayerSelectionBound::~LayerSelectionBound() {
 }
 
+void LayerSelectionBound::ToProtobuf(proto::LayerSelectionBound* proto) const {
+  proto->set_type(SelectionBoundTypeToProtobuf(type));
+  PointToProto(edge_top, proto->mutable_edge_top());
+  PointToProto(edge_bottom, proto->mutable_edge_bottom());
+  proto->set_layer_id(layer_id);
+}
+
+void LayerSelectionBound::FromProtobuf(
+    const proto::LayerSelectionBound& proto) {
+  type = SelectionBoundTypeFromProtobuf(proto.type());
+  edge_top = ProtoToPoint(proto.edge_top());
+  edge_bottom = ProtoToPoint(proto.edge_bottom());
+  layer_id = proto.layer_id();
+}
+
 bool operator==(const LayerSelectionBound& lhs,
                 const LayerSelectionBound& rhs) {
   return lhs.type == rhs.type && lhs.layer_id == rhs.layer_id &&