Check alpha-sorting of includes during presubmit.

src/snapshot-common.cc

 // Copyright 2006-2008 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.
 
 // The common functionality when building with or without snapshots.
 
 #include "src/v8.h"
 
 #include "src/api.h"
+#include "src/platform.h"
 #include "src/serialize.h"
 #include "src/snapshot.h"
-#include "src/platform.h"
 
 namespace v8 {
 namespace internal {
 
 
 static void ReserveSpaceForSnapshot(Deserializer* deserializer,
                                     const char* file_name) {
   int file_name_length = StrLength(file_name) + 10;
   Vector<char> name = Vector<char>::New(file_name_length + 1);
   OS::SNPrintF(name, "%s.size", file_name);
@@ skipping 94 matching lines @@
   deserializer.set_reservation(MAP_SPACE, context_map_space_used_);
   deserializer.set_reservation(CELL_SPACE, context_cell_space_used_);
   deserializer.set_reservation(PROPERTY_CELL_SPACE,
                                context_property_cell_space_used_);
   deserializer.DeserializePartial(isolate, &root);
   CHECK(root->IsContext());
   return Handle<Context>(Context::cast(root));
 }
 
 } }  // namespace v8::internal