Create media.dll.

media/video/capture/video_capture_proxy.h

 // Copyright (c) 2011 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_VIDEO_CAPTURE_VIDEO_CAPTURE_PROXY_H_
 #define MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_PROXY_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/task.h"
 #include "media/video/capture/video_capture.h"
 
 namespace base {
 class MessageLoopProxy;
 }
 
 namespace media {
 
 // This is a helper class to proxy a VideoCapture::EventHandler. In the renderer
 // process, the VideoCaptureImpl calls its handler on a "Video Capture" thread,
 // this class allows seamless proxying to another thread ("main thread"), which
 // would be the thread where the instance of this class is created. The
 // "proxied" handler is then called on that thread.
 // Since the VideoCapture is living on the "Video Capture" thread, querying its
 // state from the "main thread" is fundamentally racy. Instead this class keeps
 // track of the state every time it is called by the VideoCapture (on the VC
 // thread), and forwards that information to the main thread.
-class VideoCaptureHandlerProxy : public VideoCapture::EventHandler {
+class MEDIA_EXPORT VideoCaptureHandlerProxy
+    : public VideoCapture::EventHandler {
  public:
   struct VideoCaptureState {
     VideoCaptureState() : started(false), width(0), height(0), frame_rate(0) {}
     bool started;
     int width;
     int height;
     int frame_rate;
   };
 
   // Called on main thread.
@@ skipping 46 matching lines @@
   VideoCapture::EventHandler* proxied_;
   VideoCaptureState state_;
 
   scoped_refptr<base::MessageLoopProxy> main_message_loop_;
 };
 
 }  // namespace media
 DISABLE_RUNNABLE_METHOD_REFCOUNT(media::VideoCaptureHandlerProxy);
 
 #endif  // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_PROXY_H_