Check alpha-sorting of includes during presubmit.

src/arm/lithium-gap-resolver-arm.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/arm/lithium-codegen-arm.h"
 #include "src/arm/lithium-gap-resolver-arm.h"
-#include "src/arm/lithium-codegen-arm.h"
 
 namespace v8 {
 namespace internal {
 
 // We use the root register to spill a value while breaking a cycle in parallel
 // moves. We don't need access to roots while resolving the move list and using
 // the root register has two advantages:
 //  - It is not in crankshaft allocatable registers list, so it can't interfere
 //    with any of the moves we are resolving.
 //  - We don't need to push it on the stack, as we can reload it with its value
@@ skipping 274 matching lines @@
     UNREACHABLE();
   }
 
   moves_[index].Eliminate();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal