Enable stub generation using Hydrogen/Lithium (again)

src/utils.h

Index: src/utils.h
diff --git a/src/utils.h b/src/utils.h
index e03f96f6e5d3a7bb2b1c527810a180333c4a26b8..b4cd5a80cd86d3738d408eae8c8e1ce31800a313 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -1015,6 +1015,7 @@ class BailoutId {
   static BailoutId FunctionEntry() { return BailoutId(kFunctionEntryId); }
   static BailoutId Declarations() { return BailoutId(kDeclarationsId); }
   static BailoutId FirstUsable() { return BailoutId(kFirstUsableId); }
+  static BailoutId StubEntry() { return BailoutId(kStubEntryId); }
 
   bool IsNone() const { return id_ == kNoneId; }
   bool operator==(const BailoutId& other) const { return id_ == other.id_; }
@@ -1030,9 +1031,12 @@ class BailoutId {
   // code (function declarations).
   static const int kDeclarationsId = 3;
 
-  // Ever FunctionState starts with this id.
+  // Every FunctionState starts with this id.
   static const int kFirstUsableId = 4;
 
+  // Every compiled stub starts with this id.
+  static const int kStubEntryId = 5;
+
   int id_;
 };