cc: Change ClipNode::applies_local_clip to a clip_type enum

cc/proto/cc_conversions.h

Index: cc/proto/cc_conversions.h
diff --git a/cc/proto/cc_conversions.h b/cc/proto/cc_conversions.h
index 78c697b88960a0d93806fde8a26e022731a9ba41..a52124c5009fe269e7c2fe098cc3b9345cd15160 100644
--- a/cc/proto/cc_conversions.h
+++ b/cc/proto/cc_conversions.h
@@ -8,6 +8,8 @@
 #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;
@@ -28,6 +30,11 @@ 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_