Rotate frames correctly for back camera

media/capture/BUILD.gn

Index: media/capture/BUILD.gn
diff --git a/media/capture/BUILD.gn b/media/capture/BUILD.gn
index 60bd899a4294d58baae2dcc8b5ed9ca6280e7a12..b58b1a9321ffb3038696c28c09928497211dcb9b 100644
--- a/media/capture/BUILD.gn
+++ b/media/capture/BUILD.gn
@@ -30,6 +30,8 @@ component("capture") {
     "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",
@@ -156,6 +158,15 @@ component("capture") {
   }
 }
 
+copy("camera_config") {
+  sources = [
+    "video/linux/fake_camera_characteristics.conf",
+  ]
+  outputs = [
+    "$target_out_dir/fake_camera_characteristics.conf",
+  ]
+}
+
 test("capture_unittests") {
   sources = [
     "content/animated_content_sampler_unittest.cc",
@@ -163,11 +174,13 @@ test("capture_unittests") {
     "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 = [
+    ":camera_config",
     ":capture",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
@@ -178,6 +191,10 @@ test("capture_unittests") {
     "//ui/gfx:test_support",
   ]
 
+  data = [
+    "//media/capture/video/linux/fake_camera_characteristics.conf",
+  ]
+
   if (is_android) {
     deps += [
       "//media/capture/video/android",