Revert of Remove kind field from StackHandler.

src/frames-inl.h

Index: src/frames-inl.h
diff --git a/src/frames-inl.h b/src/frames-inl.h
index 014c3444a35a549cdda6d2a7ee826e25d5909770..221b0069782b09951c618107c5fb270e7ada4f28 100644
--- a/src/frames-inl.h
+++ b/src/frames-inl.h
@@ -61,15 +61,36 @@
 }
 
 
+inline bool StackHandler::is_js_entry() const {
+  return kind() == JS_ENTRY;
+}
+
+
+inline bool StackHandler::is_catch() const {
+  return kind() == CATCH;
+}
+
+
+inline bool StackHandler::is_finally() const {
+  return kind() == FINALLY;
+}
+
+
 inline Context* StackHandler::context() const {
   const int offset = StackHandlerConstants::kContextOffset;
   return Context::cast(Memory::Object_at(address() + offset));
 }
 
 
-inline int StackHandler::index() const {
+inline StackHandler::Kind StackHandler::kind() const {
   const int offset = StackHandlerConstants::kStateIntOffset;
-  return Memory::int_at(address() + offset);
+  return KindField::decode(Memory::unsigned_at(address() + offset));
+}
+
+
+inline unsigned StackHandler::index() const {
+  const int offset = StackHandlerConstants::kStateIntOffset;
+  return IndexField::decode(Memory::unsigned_at(address() + offset));
 }