Reland CL to implement browser-side logging to WebRtc log.

media/video/capture/win/video_capture_device_win.h

 // Copyright (c) 2012 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.
 
 // Windows specific implementation of VideoCaptureDevice.
 // DirectShow is used for capturing. DirectShow provide its own threads
 // for capturing.
 
 #ifndef MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_
 #define MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_
@@ skipping 41 matching lines @@
     kIdle,  // The device driver is opened but camera is not in use.
     kCapturing,  // Video is being captured.
     kError  // Error accessing HW functions.
             // User needs to recover by destroying the object.
   };
 
   // Implements SinkFilterObserver.
   virtual void FrameReceived(const uint8* buffer, int length);
 
   bool CreateCapabilityMap();
-  void SetErrorState(const char* reason);
+  void SetErrorState(const std::string& reason);
 
   Name device_name_;
   InternalState state_;
   scoped_ptr<VideoCaptureDevice::Client> client_;
 
   base::win::ScopedComPtr<IBaseFilter> capture_filter_;
   base::win::ScopedComPtr<IGraphBuilder> graph_builder_;
   base::win::ScopedComPtr<IMediaControl> media_control_;
   base::win::ScopedComPtr<IPin> input_sink_pin_;
   base::win::ScopedComPtr<IPin> output_capture_pin_;
   // Used when using a MJPEG decoder.
   base::win::ScopedComPtr<IBaseFilter> mjpg_filter_;
   base::win::ScopedComPtr<IPin> input_mjpg_pin_;
   base::win::ScopedComPtr<IPin> output_mjpg_pin_;
 
   scoped_refptr<SinkFilter> sink_filter_;
 
   // Map of all capabilities this device support.
   CapabilityList capabilities_;
   VideoCaptureFormat capture_format_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceWin);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_WIN_VIDEO_CAPTURE_DEVICE_WIN_H_