Extend VideoCaptureDevice::Client::OnError() to have a tracked_objects::Location param.

media/capture/video/mac/video_capture_device_decklink_mac.h

 // Copyright 2014 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.
 
 // Implementation of VideoCaptureDevice class for Blackmagic video capture
 // devices by using the DeckLink SDK.
 
 #ifndef MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_
 #define MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_
 
 #include "media/capture/video/video_capture_device.h"
 
 #import <Foundation/Foundation.h>
 
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 
 namespace {
 class DeckLinkCaptureDelegate;
 }  // namespace
 
+namespace tracked_objects {
+class Location;
+}  // namespace tracked_objects
+
 namespace media {
 
 // Extension of VideoCaptureDevice to create and manipulate Blackmagic devices.
 // Creates a reference counted |decklink_capture_delegate_| that does all the
 // DeckLink SDK configuration and capture work while holding a weak reference to
 // us for sending back frames, logs and error messages.
 class MEDIA_EXPORT VideoCaptureDeviceDeckLinkMac : public VideoCaptureDevice {
  public:
   // Gets the names of all DeckLink video capture devices connected to this
   // computer, as enumerated by the DeckLink SDK. To allow the user to choose
@@ skipping 13 matching lines @@
 
   // Copy of VideoCaptureDevice::Client::OnIncomingCapturedData(). Used by
   // |decklink_capture_delegate_| to forward captured frames.
   void OnIncomingCapturedData(const uint8* data,
                               size_t length,
                               const VideoCaptureFormat& frame_format,
                               int rotation,  // Clockwise.
                               base::TimeTicks timestamp);
 
   // Forwarder to VideoCaptureDevice::Client::OnError().
-  void SendErrorString(const std::string& reason);
+  void SendErrorString(const tracked_objects::Location& from_here,
+                       const std::string& reason);
 
   // Forwarder to VideoCaptureDevice::Client::OnLog().
   void SendLogString(const std::string& message);
 
  private:
   // VideoCaptureDevice implementation.
   void AllocateAndStart(const VideoCaptureParams& params,
                         scoped_ptr<VideoCaptureDevice::Client> client) override;
   void StopAndDeAllocate() override;
 
   // Protects concurrent setting and using of |client_|.
   base::Lock lock_;
   scoped_ptr<VideoCaptureDevice::Client> client_;
 
   // Reference counted handle to the DeckLink capture delegate, ref counted by
   // the DeckLink SDK as well.
   scoped_refptr<DeckLinkCaptureDelegate> decklink_capture_delegate_;
 
   // Checks for Device (a.k.a. Audio) thread.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceDeckLinkMac);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_