Subject .mm files to the header sorting presubmit

ui/gfx/ios/NSString+CrStringDrawing_unittest.mm

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 #import "ui/gfx/ios/NSString+CrStringDrawing.h"
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
+#include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
-#include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 namespace {
 
 typedef PlatformTest NSStringCrStringDrawing;
 
 // These tests verify that the category methods return the same values as the
 // deprecated methods, so ignore warnings about using deprecated methods.
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wdeprecated-declarations"
@@ skipping 142 matching lines @@
   EXPECT_NSEQ(@"", result);
   result = [@"lorem ipsum dolores"
       cr_stringByElidingToFitSize:CGSizeMake(1000, 1000)];
   EXPECT_NSEQ(@"lorem ipsum dolores", result);
   result =
       [@"lorem ipsum dolores" cr_stringByElidingToFitSize:CGSizeMake(30, 50)];
   EXPECT_TRUE([@"lorem ipsum dolores" length] > [result length]);
 }
 
 }  // namespace