Switch to standard integer types in components/, part 2 of 4.

components/mus/public/cpp/window_tracker.h

 // 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.
 
 #ifndef COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TRACKER_H_
 #define COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TRACKER_H_
 
 #include <stdint.h>
 #include <set>
 
+#include "base/macros.h"
 #include "components/mus/public/cpp/window_observer.h"
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mus {
 
 class WindowTracker : public WindowObserver {
  public:
   using Windows = std::set<Window*>;
 
   WindowTracker();
@@ skipping 17 matching lines @@
 
  private:
   Windows windows_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(WindowTracker);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TRACKER_H_