Fix a bunch of IWYU violators that don't include scoped_ptr.h

content/browser/media/capture/window_activity_tracker.h

 // Copyright (c) 2015 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 CONTENT_BROWSER_MEDIA_CAPTURE_WINDOW_ACTIVITY_TRACKER_H_
 #define CONTENT_BROWSER_MEDIA_CAPTURE_WINDOW_ACTIVITY_TRACKER_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/content_export.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace content {
 
 // WindowActivityTracker is an interface that can be implememented to report
 // whether the user is actively interacting with UI.
 class CONTENT_EXPORT WindowActivityTracker {
  public:
@@ skipping 28 matching lines @@
   // such as mouse movement, a single continuous movement is treated
   // as one event.
   int ui_events_count_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowActivityTracker);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_CAPTURE_WINDOW_ACTIVITY_TRACKER_H_