Add VideoCaptureDevice::GetDeviceSupportedFormats to interface + implementation for Linux and Fake

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 203 matching lines @@
   virtual void Stop() = 0;
 
   // Deallocates the camera. This means other applications can use it. After
   // this function has been called the capture device is reset to the state it
   // was when created. After DeAllocate() is called, the VideoCaptureDevice is
   // not permitted to make any additional calls to its EventHandler.
   virtual void DeAllocate() = 0;
 
   // Get the name of the capture device.
   virtual const Name& device_name() = 0;
+
+  // Gets the supported video capture formats, if operation is supported by the
+  // driver, for a particular video capture device identified by device_name.

[scherkus (not reviewing), 2013/09/11 17:30:46]

does this method need to be part of this interface?

looking at the implementation of
VideoCaptureDeviceLinux::GetDeviceSupportedFormats() it doesn't use any members
of the class -- it's pretty much a static method

this is also requires clients to create a VideoCaptureDevice for some device
before being able to query this method

+  virtual void GetDeviceSupportedFormats(
+      const std::string& device_name,
+      VideoCaptureFormats* capture_formats) = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_