Check alpha-sorting of includes during presubmit.

src/parser.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_PARSER_H_
 #define V8_PARSER_H_
 
 #include "src/allocation.h"
 #include "src/ast.h"
 #include "src/compiler.h"  // For CachedDataMode
+#include "src/preparse-data.h"
 #include "src/preparse-data-format.h"
-#include "src/preparse-data.h"
+#include "src/preparser.h"
 #include "src/scopes.h"
-#include "src/preparser.h"
 
 namespace v8 {
 class ScriptCompiler;
 
 namespace internal {
 
 class CompilationInfo;
 class ParserLog;
 class PositionStack;
 class Target;
@@ skipping 808 matching lines @@
  private:
   static const int kLiteralTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_