Fix IWYU violators that don't include scoped_ptr.h in Android build.

media/base/android/media_drm_bridge_cdm_context.h

 // Copyright 2016 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 MEDIA_BASE_ANDROID_MEDIA_DRM_BRIDGE_CDM_CONTEXT_H_
 #define MEDIA_BASE_ANDROID_MEDIA_DRM_BRIDGE_CDM_CONTEXT_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/callback.h"
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "media/base/cdm_context.h"
 #include "media/base/media_export.h"
 #include "media/base/player_tracker.h"
 
 namespace media {
 
 class MediaDrmBridge;
 
 // The CdmContext implementation for MediaDrmBridge. MediaDrmBridge supports
 // neither Decryptor nor CDM ID, but uses MediaCrypto to connect to MediaCodec.
@@ skipping 41 matching lines @@
 
  private:
   MediaDrmBridge* const media_drm_bridge_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaDrmBridgeCdmContext);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_DRM_BRIDGE_CDM_CONTEXT_H_