Reland of rotate frames correctly for back camera

media/capture/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//media/media_options.gni")
 import("//testing/test.gni")
 
 component("capture") {
   defines = [ "CAPTURE_IMPLEMENTATION" ]
@@ skipping 12 matching lines @@
     "content/video_capture_oracle.cc",
     "content/video_capture_oracle.h",
     "video/fake_video_capture_device.cc",
     "video/fake_video_capture_device.h",
     "video/fake_video_capture_device_factory.cc",
     "video/fake_video_capture_device_factory.h",
     "video/file_video_capture_device.cc",
     "video/file_video_capture_device.h",
     "video/file_video_capture_device_factory.cc",
     "video/file_video_capture_device_factory.h",
+    "video/linux/camera_facing_chromeos.cc",
+    "video/linux/camera_facing_chromeos.h",
     "video/linux/v4l2_capture_delegate.cc",
     "video/linux/v4l2_capture_delegate.h",
     "video/linux/video_capture_device_chromeos.cc",
     "video/linux/video_capture_device_chromeos.h",
     "video/linux/video_capture_device_factory_linux.cc",
     "video/linux/video_capture_device_factory_linux.h",
     "video/linux/video_capture_device_linux.cc",
     "video/linux/video_capture_device_linux.h",
     "video/mac/video_capture_device_avfoundation_mac.h",
     "video/mac/video_capture_device_avfoundation_mac.mm",
@@ skipping 113 matching lines @@
   }
 }
 
 test("capture_unittests") {
   sources = [
     "content/animated_content_sampler_unittest.cc",
     "content/capture_resolution_chooser_unittest.cc",
     "content/smooth_event_sampler_unittest.cc",
     "content/video_capture_oracle_unittest.cc",
     "video/fake_video_capture_device_unittest.cc",
+    "video/linux/camera_facing_chromeos_unittest.cc",
     "video/mac/video_capture_device_factory_mac_unittest.mm",
     "video/video_capture_device_unittest.cc",
   ]
 
   deps = [
     ":capture",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//media/base:test_support",
     "//media/mojo/interfaces:image_capture",
     "//testing/gmock",
     "//testing/gtest",
     "//ui/gfx:test_support",
   ]
 
   if (is_android) {
     deps += [
       "//media/capture/video/android",
       "//media/capture/video/android:capture_java",
     ]
   }
 
   if (is_win) {
     # TODO(jschuh): https://crbug.com/167187 fix size_t to int truncations.
     configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
   }
 }