Move regexp implementation into its own folder.

src/regexp/x64/regexp-macro-assembler-x64.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_X64_REGEXP_MACRO_ASSEMBLER_X64_H_
-#define V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_
+#ifndef V8_REGEXP_X64_REGEXP_MACRO_ASSEMBLER_X64_H_
+#define V8_REGEXP_X64_REGEXP_MACRO_ASSEMBLER_X64_H_
 
 #include "src/macro-assembler.h"
+#include "src/regexp/regexp-macro-assembler.h"
 #include "src/x64/assembler-x64.h"
-#include "src/x64/macro-assembler-x64.h"
 
 namespace v8 {
 namespace internal {
 
 #ifndef V8_INTERPRETED_REGEXP
 
 class RegExpMacroAssemblerX64: public NativeRegExpMacroAssembler {
  public:
   RegExpMacroAssemblerX64(Isolate* isolate, Zone* zone, Mode mode,
                           int registers_to_save);
@@ skipping 250 matching lines @@
   Label backtrack_label_;
   Label exit_label_;
   Label check_preempt_label_;
   Label stack_overflow_label_;
 };
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
-#endif  // V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_
+#endif  // V8_REGEXP_X64_REGEXP_MACRO_ASSEMBLER_X64_H_