Rotate frames correctly for back camera

media/capture/video/linux/camera_facing_chromeos_unittest.cc

+// Copyright 2016 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 <string>
+
+#include "media/capture/video/linux/camera_facing_chromeos.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media {
+
+TEST(CameraFacingChromeOSTest, ParseSuccessfully) {
+  CameraFacingChromeOS camera_facing("fake_camera_characteristics.conf");
+  EXPECT_EQ(CameraFacingChromeOS::LensFacing::BACK,
+            camera_facing.GetCameraFacing(std::string("/dev/video2"),
+                                          std::string("04f2:b53a")));
+}
+
+TEST(CameraFacingChromeOSTest, ConfigFileNotExist) {
+  CameraFacingChromeOS camera_facing("file_not_exist");
+  EXPECT_EQ(CameraFacingChromeOS::LensFacing::FRONT,
+            camera_facing.GetCameraFacing(std::string("/dev/video2"),
+                                          std::string("04f2:b53a")));
+}
+
+}  // namespace media