media: Fix mojo pipeline integration tests.

media/base/null_video_sink.h

 // Copyright 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 MEDIA_AUDIO_NULL_VIDEO_SINK_H_
 #define MEDIA_AUDIO_NULL_VIDEO_SINK_H_
 
 #include "base/cancelable_callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/default_tick_clock.h"
 #include "base/time/tick_clock.h"
+#include "media/base/media_export.h"
 #include "media/base/video_renderer_sink.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 namespace media {
 
-class NullVideoSink : public VideoRendererSink {
+class MEDIA_EXPORT NullVideoSink : public VideoRendererSink {
  public:
   using NewFrameCB = base::Callback<void(const scoped_refptr<VideoFrame>&)>;
 
   // Periodically calls |callback| every |interval| on |task_runner| once the
   // sink has been started.  If |clockless| is true, the RenderCallback will
   // be called back to back by repeated post tasks. Optionally, if specified,
   // |new_frame_cb| will be called for each new frame received.
   NullVideoSink(bool clockless,
                 base::TimeDelta interval,
                 const NewFrameCB& new_frame_cb,
@@ skipping 55 matching lines @@
 
   // Value passed to RenderCallback::Render().
   bool background_render_;
 
   DISALLOW_COPY_AND_ASSIGN(NullVideoSink);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_NULL_VIDEO_SINK_H_