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

media/video/capture/video_capture_device_dummy.cc

 // Copyright (c) 2011 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.
 
 #include "media/video/capture/video_capture_device_dummy.h"
 
 namespace media {
 
 VideoCaptureDevice* VideoCaptureDevice::Create(const Name& device_name) {
   return NULL;
 }
 
 void VideoCaptureDevice::GetDeviceNames(Names* device_names) {}
 
 VideoCaptureDeviceDummy::VideoCaptureDeviceDummy() {}
 
 VideoCaptureDeviceDummy::~VideoCaptureDeviceDummy() {}
 
 void VideoCaptureDeviceDummy::Allocate(
     const VideoCaptureCapability& capture_format,
     VideoCaptureDevice::EventHandler* observer) {
 }
 
 void VideoCaptureDeviceDummy::Start() {}
 
 void VideoCaptureDeviceDummy::Stop() {}
 
 void VideoCaptureDeviceDummy::DeAllocate() {}
 
+void VideoCaptureDeviceDummy::GetDeviceSupportedFormats(
+    const std::string& device_name,
+    VideoCaptureFormats* capture_formats) {};
+
 }  // namespace media