Check alpha-sorting of includes during presubmit.

src/objects-debug.cc

 // 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.
 
 #include "src/v8.h"
 
+#include "src/disasm.h"
 #include "src/disassembler.h"
-#include "src/disasm.h"
 #include "src/jsregexp.h"
 #include "src/macro-assembler.h"
 #include "src/objects-visiting.h"
 
 namespace v8 {
 namespace internal {
 
 #ifdef VERIFY_HEAP
 
 void Object::ObjectVerify() {
@@ skipping 1167 matching lines @@
   for (int i = 0; i < number_of_transitions(); ++i) {
     if (!CheckOneBackPointer(current_map, GetTarget(i))) return false;
   }
   return true;
 }
 
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal