Improve video capture columns in chrome://media-internals

media/video/capture/video_capture_device.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.
 //
 // VideoCaptureDevice is the abstract base class for realizing video capture
 // device support in Chromium. It provides the interface for OS dependent
 // implementations.
 // The class is created and functions are invoked on a thread owned by
 // VideoCaptureManager. Capturing is done on other threads, depending on the OS
 // specific implementation.
@@ skipping 88 matching lines @@
       return other.id() == unique_id_;
     }
     bool operator<(const Name& other) const {
       return unique_id_ < other.id();
     }
 
 #if defined(OS_WIN) || defined(OS_MACOSX)
     CaptureApiType capture_api_type() const {
       return capture_api_class_.capture_api_type();
     }
+    const char* GetCaptureApiTypeString() const;
 #endif
 #if defined(OS_WIN)
     // Certain devices need an ID different from the |unique_id_| for
     // capabilities retrieval.
     const std::string& capabilities_id() const {
       return capabilities_id_;
     }
     void set_capabilities_id(const std::string& id) {
       capabilities_id_ = id;
     }
@@ skipping 201 matching lines @@
   virtual void CaptureImage() {}
 
  protected:
   static const int kPowerLine50Hz = 50;
   static const int kPowerLine60Hz = 60;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_