Add support for Tegra V4L2 VDA

content/common/gpu/media/v4l2_video_device.cc

 // 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.
 
 #include "base/debug/trace_event.h"
 #include "content/common/gpu/media/exynos_v4l2_video_device.h"
+#include "content/common/gpu/media/tegra_v4l2_video_device.h"
 
 namespace content {
 
 V4L2Device::V4L2Device() {}
 
 V4L2Device::~V4L2Device() {}
 
 // static
-scoped_ptr<V4L2Device> V4L2Device::Create() {
+scoped_ptr<V4L2Device> V4L2Device::Create(EGLContext egl_context) {
   DVLOG(3) << __PRETTY_FUNCTION__;
 
-  scoped_ptr<ExynosV4L2Device> device(new ExynosV4L2Device());
-  if (!device->Initialize()) {
-    // TODO(shivdasp): Try and create other V4L2Devices.
-    device.reset(NULL);
-  }
-  return device.PassAs<V4L2Device>();
+  scoped_ptr<ExynosV4L2Device> exynos_device(new ExynosV4L2Device());
+  if (exynos_device->Initialize())
+    return exynos_device.PassAs<V4L2Device>();
+
+  scoped_ptr<TegraV4L2Device> tegra_device(new TegraV4L2Device(egl_context));
+  if (tegra_device->Initialize())
+    return tegra_device.PassAs<V4L2Device>();
+
+  DLOG(ERROR) << "Failed to create V4L2Device";
+  return scoped_ptr<V4L2Device>();
 }
 }  //  namespace content