Add support for multiple V4L2 video devices of the same type.

media/gpu/ipc/service/gpu_video_encode_accelerator.cc

 // Copyright 2013 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/gpu/ipc/service/gpu_video_encode_accelerator.h"
 
 #include <memory>
 
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 44 matching lines @@
   if (!stub->decoder()->MakeCurrent()) {
     DLOG(ERROR) << "Failed to MakeCurrent()";
     return false;
   }
 
   return true;
 }
 
 #if defined(OS_CHROMEOS) && defined(USE_V4L2_CODEC)
 std::unique_ptr<VideoEncodeAccelerator> CreateV4L2VEA() {
-  scoped_refptr<V4L2Device> device = V4L2Device::Create(V4L2Device::kEncoder);
+  scoped_refptr<V4L2Device> device = V4L2Device::Create();
   if (!device)
     return nullptr;
   return base::WrapUnique<VideoEncodeAccelerator>(
       new V4L2VideoEncodeAccelerator(device));
 }
 #endif
 
 #if defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)
 std::unique_ptr<VideoEncodeAccelerator> CreateVaapiVEA() {
   return base::WrapUnique<VideoEncodeAccelerator>(
@@ skipping 290 matching lines @@
   Send(new AcceleratedVideoEncoderHostMsg_NotifyInputDone(host_route_id_,
                                                           frame_id));
   // Just let |shm| fall out of scope.
 }
 
 void GpuVideoEncodeAccelerator::Send(IPC::Message* message) {
   stub_->channel()->Send(message);
 }
 
 }  // namespace media