Check alpha-sorting of includes during presubmit.

test/cctest/test-regexp.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 16 matching lines @@
 
 
 #include <stdlib.h>
 
 #include "src/v8.h"
 
 #include "src/ast.h"
 #include "src/char-predicates-inl.h"
 #include "src/jsregexp.h"
 #include "src/parser.h"
+#include "src/regexp-macro-assembler.h"
 #include "src/regexp-macro-assembler-irregexp.h"
-#include "src/regexp-macro-assembler.h"
 #include "src/string-stream.h"
 #include "src/zone-inl.h"
 #ifdef V8_INTERPRETED_REGEXP
 #include "src/interpreter-irregexp.h"
 #else  // V8_INTERPRETED_REGEXP
 #include "src/macro-assembler.h"
-#include "src/code.h"
 #if V8_TARGET_ARCH_ARM
-#include "src/arm/assembler-arm.h"
+#include "src/arm/assembler-arm.h"  // NOLINT
 #include "src/arm/macro-assembler-arm.h"
 #include "src/arm/regexp-macro-assembler-arm.h"
 #endif
 #if V8_TARGET_ARCH_ARM64
 #include "src/arm64/assembler-arm64.h"
 #include "src/arm64/macro-assembler-arm64.h"
 #include "src/arm64/regexp-macro-assembler-arm64.h"
 #endif
 #if V8_TARGET_ARCH_MIPS
 #include "src/mips/assembler-mips.h"
@@ skipping 1753 matching lines @@
   ZoneList<CharacterRange> first_only(4, &zone);
   ZoneList<CharacterRange> second_only(4, &zone);
   ZoneList<CharacterRange> both(4, &zone);
 }
 
 
 TEST(Graph) {
   V8::Initialize(NULL);
   Execute("\\b\\w+\\b", false, true, true);
 }