Move regexp implementation into its own folder.

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

 // Copyright 2008-2009 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_INL_H_
-#define V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_INL_H_
+#ifndef V8_REGEXP_REGEXP_MACRO_ASSEMBLER_IRREGEXP_INL_H_
+#define V8_REGEXP_REGEXP_MACRO_ASSEMBLER_IRREGEXP_INL_H_
 
 #include "src/ast.h"
-#include "src/bytecodes-irregexp.h"
+#include "src/regexp/bytecodes-irregexp.h"
 
 namespace v8 {
 namespace internal {
 
 #ifdef V8_INTERPRETED_REGEXP
 
 void RegExpMacroAssemblerIrregexp::Emit(uint32_t byte,
                                         uint32_t twenty_four_bits) {
   uint32_t word = ((twenty_four_bits << BYTECODE_SHIFT) | byte);
   DCHECK(pc_ <= buffer_.length());
@@ skipping 31 matching lines @@
     Expand();
   }
   *reinterpret_cast<uint32_t*>(buffer_.start() + pc_) = word;
   pc_ += 4;
 }
 
 #endif  // V8_INTERPRETED_REGEXP
 
 } }  // namespace v8::internal
 
-#endif  // V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_INL_H_
+#endif  // V8_REGEXP_REGEXP_MACRO_ASSEMBLER_IRREGEXP_INL_H_