Create ast/ and parsing/ subdirectories and move appropriate files

test/cctest/expression-type-collector.h

 // Copyright 2015 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_EXPRESSION_TYPE_COLLECTOR_H_
 #define V8_EXPRESSION_TYPE_COLLECTOR_H_
 
-#include "src/ast-expression-visitor.h"
+#include "src/ast/ast-expression-visitor.h"
 
 namespace v8 {
 namespace internal {
 
 // A Visitor over an AST that collects a human readable string summarizing
 // structure and types. Used for testing of the typing information attached
 // to the expression nodes of an AST.
 
 struct ExpressionTypeEntry {
   int depth;
@@ skipping 11 matching lines @@
  protected:
   void VisitExpression(Expression* expression);
 
  private:
   ZoneVector<ExpressionTypeEntry>* result_;
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_EXPRESSION_TYPE_COLLECTOR_H_