Create ast/ and parsing/ subdirectories and move appropriate files

src/ast/variables.h

 // Copyright 2011 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_VARIABLES_H_
-#define V8_VARIABLES_H_
+#ifndef V8_AST_VARIABLES_H_
+#define V8_AST_VARIABLES_H_
 
-#include "src/ast-value-factory.h"
+#include "src/ast/ast-value-factory.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 
 // The AST refers to variables via VariableProxies - placeholders for the actual
 // variables. Variables themselves are never directly referred to from the AST,
 // they are maintained by scopes, and referred to from VariableProxies and Slots
 // after binding and variable allocation.
 
@@ skipping 185 matching lines @@
 
  private:
   // For classes we keep track of consecutive groups of delcarations. They are
   // needed for strong mode scoping checks. TODO(marja, rossberg): Implement
   // checks for functions too.
   int declaration_group_start_;
 };
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_VARIABLES_H_
+#endif  // V8_AST_VARIABLES_H_