Clean up header files.

components/mus/public/cpp/tests/window_unittest.cc

 // 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.
 
 #include "components/mus/public/cpp/window.h"
 
+#include <limits.h>
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "components/mus/common/util.h"
 #include "components/mus/public/cpp/lib/window_private.h"
 #include "components/mus/public/cpp/property_type_converters.h"
 #include "components/mus/public/cpp/tests/test_window.h"
@@ skipping 1108 matching lines @@
   scoped_ptr<TestWindow> window0(CreateTestWindow(1, parent.get()));
   scoped_ptr<TestWindow> window1(CreateTestWindow(2, parent.get()));
 
   TestWindow* window2 = CreateTestWindow(3, parent.get());
 
   window0->AddTransientWindow(window2);
   EXPECT_EQ("1 3 2", ChildWindowIDsAsString(parent.get()));
 }
 
 }  // namespace mus