Add support for \b and ^ and $ in multiline mode, completing Irregexp...

src/regexp-macro-assembler-ia32.h

 // Copyright 2008 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 25 matching lines @@
   enum Mode { ASCII = 1, UC16 = 2 };
   enum Result { EXCEPTION = -1, FAILURE = 0, SUCCESS = 1 };
 
   RegExpMacroAssemblerIA32(Mode mode, int registers_to_save);
   virtual ~RegExpMacroAssemblerIA32();
   virtual int stack_limit_slack();
   virtual void AdvanceCurrentPosition(int by);
   virtual void AdvanceRegister(int reg, int by);
   virtual void Backtrack();
   virtual void Bind(Label* label);
+  virtual void CheckAtStart(Label* on_at_start);
   virtual void CheckBitmap(uc16 start, Label* bitmap, Label* on_zero);
   virtual void CheckCharacter(uint32_t c, Label* on_equal);
   virtual void CheckCharacterAfterAnd(uint32_t c,
                                       uint32_t mask,
                                       Label* on_equal);
   virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
   virtual void CheckCharacterLT(uc16 limit, Label* on_less);
   virtual void CheckCharacters(Vector<const uc16> str,
                                int cp_offset,
                                Label* on_failure,
@@ skipping 195 matching lines @@
   Label check_preempt_label_;
   Label stack_overflow_label_;
 
   // Handle used to represent the generated code object itself.
   Handle<Object> self_;
 };
 
 }}  // namespace v8::internal
 
 #endif /* REGEXP_MACRO_ASSEMBLER_IA32_H_ */