cc: Change ClipNode::applies_local_clip to a clip_type enum

cc/proto/cc_conversions.h

 // 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.
 
 #ifndef CC_PROTO_CC_CONVERSIONS_H_
 #define CC_PROTO_CC_CONVERSIONS_H_
 
 #include "cc/base/cc_export.h"
 #include "cc/input/scrollbar.h"
 #include "cc/proto/layer.pb.h"
+#include "cc/proto/property_tree.pb.h"
+#include "cc/trees/clip_node.h"
 
 namespace cc {
 class Region;
 
 namespace proto {
 class Region;
 }  // namespace proto
 
 // TODO(dtrainor): Move these to a class and make them static
 // (crbug.com/548432).
 CC_EXPORT void RegionToProto(const Region& region, proto::Region* proto);
 CC_EXPORT Region RegionFromProto(const proto::Region& proto);
 
 // Conversion methods for ScrollbarOrientation.
 CC_EXPORT proto::SolidColorScrollbarLayerProperties::ScrollbarOrientation
 ScrollbarOrientationToProto(const ScrollbarOrientation& orientation);
 CC_EXPORT ScrollbarOrientation ScrollbarOrientationFromProto(
     const proto::SolidColorScrollbarLayerProperties::ScrollbarOrientation&
         proto);
 
+proto::ClipNodeData::ClipType ClipNodeTypeToProto(
+    const ClipNode::ClipType& clip_type);
+ClipNode::ClipType ClipNodeTypeFromProto(
+    const proto::ClipNodeData::ClipType& clip_type);
+
 }  // namespace cc
 
 #endif  // CC_PROTO_CC_CONVERSIONS_H_