Enable stub generation using Hydrogen/Lithium (again)

src/frames.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 118 matching lines @@
   DISALLOW_IMPLICIT_CONSTRUCTORS(StackHandler);
 };
 
 
 #define STACK_FRAME_TYPE_LIST(V)              \
   V(ENTRY,             EntryFrame)            \
   V(ENTRY_CONSTRUCT,   EntryConstructFrame)   \
   V(EXIT,              ExitFrame)             \
   V(JAVA_SCRIPT,       JavaScriptFrame)       \
   V(OPTIMIZED,         OptimizedFrame)        \
+  V(STUB,              StubFrame)             \
   V(INTERNAL,          InternalFrame)         \
   V(CONSTRUCT,         ConstructFrame)        \
   V(ARGUMENTS_ADAPTOR, ArgumentsAdaptorFrame)
 
 
 // Abstract base class for all stack frames.
 class StackFrame BASE_EMBEDDED {
  public:
 #define DECLARE_TYPE(type, ignore) type,
   enum Type {
@@ skipping 399 matching lines @@
   void IterateArguments(ObjectVisitor* v) const;
 
  private:
   inline Object* function_slot_object() const;
 
   friend class StackFrameIterator;
   friend class StackTracer;
 };
 
 
-class OptimizedFrame : public JavaScriptFrame {
+class CompiledFrame : public JavaScriptFrame {
+ public:
+  virtual Type type() const = 0;
+
+  // GC support.
+  virtual void Iterate(ObjectVisitor* v) const;
+
+ protected:
+  inline explicit CompiledFrame(StackFrameIterator* iterator);
+};
+
+
+class StubFrame : public CompiledFrame {
+ public:
+  virtual Type type() const { return STUB; }
+
+  // GC support.
+  virtual void Iterate(ObjectVisitor* v) const;
+
+ protected:
+  inline explicit StubFrame(StackFrameIterator* iterator);
+
+  friend class StackFrameIterator;
+};
+
+
+class OptimizedFrame : public CompiledFrame {
  public:
   virtual Type type() const { return OPTIMIZED; }
 
   // GC support.
   virtual void Iterate(ObjectVisitor* v) const;
 
   virtual int GetInlineCount();
 
   // Return a list with JSFunctions of this frame.
   // The functions are ordered bottom-to-top (i.e. functions.last()
@@ skipping 324 matching lines @@
 };
 
 
 // Reads all frames on the current stack and copies them into the current
 // zone memory.
 Vector<StackFrame*> CreateStackMap(Zone* zone);
 
 } }  // namespace v8::internal
 
 #endif  // V8_FRAMES_H_