Move regexp implementation into its own folder.

src/ast.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_AST_H_
 #define V8_AST_H_
 
 #include "src/assembler.h"
 #include "src/ast-value-factory.h"
 #include "src/bailout-reason.h"
 #include "src/base/flags.h"
 #include "src/base/smart-pointers.h"
 #include "src/factory.h"
 #include "src/isolate.h"
-#include "src/jsregexp.h"
 #include "src/list.h"
 #include "src/modules.h"
+#include "src/regexp/jsregexp.h"
 #include "src/runtime/runtime.h"
 #include "src/small-pointer-list.h"
 #include "src/token.h"
 #include "src/types.h"
 #include "src/utils.h"
 #include "src/variables.h"
 
 namespace v8 {
 namespace internal {
 
@@ skipping 3599 matching lines @@
 
  private:
   Zone* zone_;
   AstValueFactory* ast_value_factory_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_