Check alpha-sorting of includes during presubmit.

test/cctest/test-log.cc

 // Copyright 2006-2009 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 19 matching lines @@
 #ifdef __linux__
 #include <pthread.h>
 #include <signal.h>
 #include <unistd.h>
 #include <cmath>
 #endif  // __linux__
 
 #include "src/v8.h"
 
 #include "src/cpu-profiler.h"
+#include "src/log.h"
 #include "src/log-utils.h"
-#include "src/log.h"
 #include "src/natives.h"
 #include "src/utils.h"
 #include "src/v8threads.h"
 #include "src/vm-state-inl.h"
 #include "test/cctest/cctest.h"
 
 using v8::internal::Address;
 using v8::internal::EmbeddedVector;
 using v8::internal::Logger;
 using v8::internal::StrLength;
@@ skipping 434 matching lines @@
     v8::Local<v8::String> s = result->ToString();
     i::ScopedVector<char> data(s->Utf8Length() + 1);
     CHECK_NE(NULL, data.start());
     s->WriteUtf8(data.start());
     printf("%s\n", data.start());
     // Make sure that our output is written prior crash due to CHECK failure.
     fflush(stdout);
     CHECK(false);
   }
 }