Android ScreenCapture: add support to device rotation.

content/browser/media/capture/screen_capture_device_android.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 CONTENT_BROWSER_MEDIA_CAPTURE_SCREEN_CAPTURE_DEVICE_ANDROID_H_
 #define CONTENT_BROWSER_MEDIA_CAPTURE_SCREEN_CAPTURE_DEVICE_ANDROID_H_
 
 #include <memory>
 
+#include "content/common/content_export.h"
 #include "media/capture/content/screen_capture_device_core.h"
 #include "media/capture/video/video_capture_device.h"
 
 namespace content {
 
 // ScreenCaptureDeviceAndroid is a forwarder to media::ScreenCaptureDeviceCore
 // while keeping the Power Saving from kicking in between AllocateAndStart() and
 // StopAndDeAllocate().
-class ScreenCaptureDeviceAndroid : public media::VideoCaptureDevice {
+class CONTENT_EXPORT ScreenCaptureDeviceAndroid
+    : public media::VideoCaptureDevice {
  public:
   ScreenCaptureDeviceAndroid();
   ~ScreenCaptureDeviceAndroid() override;
 
   // VideoCaptureDevice implementation.
   void AllocateAndStart(const media::VideoCaptureParams& params,
                         std::unique_ptr<Client> client) override;
   void StopAndDeAllocate() override;
   void RequestRefreshFrame() override;
 
  private:
   media::ScreenCaptureDeviceCore core_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenCaptureDeviceAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_CAPTURE_SCREEN_CAPTURE_DEVICE_ANDROID_H_