Move regexp implementation into its own folder.

src/regexp/regexp-macro-assembler-irregexp.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
-#define V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
+#ifndef V8_REGEXP_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
+#define V8_REGEXP_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
 
-#include "src/regexp-macro-assembler.h"
+#include "src/regexp/regexp-macro-assembler.h"
 
 namespace v8 {
 namespace internal {
 
 #ifdef V8_INTERPRETED_REGEXP
 
 // A light-weight assembler for the Irregexp byte code.
 class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
  public:
   // Create an assembler. Instructions and relocation information are emitted
@@ skipping 101 matching lines @@
 
   static const int kInvalidPC = -1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(RegExpMacroAssemblerIrregexp);
 };
 
 #endif  // V8_INTERPRETED_REGEXP
 
 } }  // namespace v8::internal
 
-#endif  // V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
+#endif  // V8_REGEXP_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_