Add support for pixel format UYVY in Linux video capture

BUG=410202
TEST=Use Kinect camera on Linux. Go to page https://src.chromium.org/svn/trunk/src/chrome/test/data/webrtc/manual/peerconnection.html. Press button "Get devices". An entry "Microsoft Kinect Camera" should show up in the "Video source" list. Press button "Request GetUserMedia". You should get a stream with size 640x480 in the preview.

Review URL: https://codereview.chromium.org/539443003

Cr-Commit-Position: refs/heads/master@{#293178}

media/video/capture/linux/video_capture_device_linux.cc

@@ -43,7 +43,8 @@ enum { kTypicalFramerate = 30 };
 // V4L2 color formats VideoCaptureDeviceLinux support.
 static const int32 kV4l2RawFmts[] = {
   V4L2_PIX_FMT_YUV420,
-  V4L2_PIX_FMT_YUYV
+  V4L2_PIX_FMT_YUYV,
+  V4L2_PIX_FMT_UYVY
 };
 
 // USB VID and PID are both 4 bytes long.
@@ -82,6 +83,9 @@ VideoPixelFormat VideoCaptureDeviceLinux::V4l2ColorToVideoCaptureColorFormat(
     case V4L2_PIX_FMT_YUYV:
       result = PIXEL_FORMAT_YUY2;
       break;
+    case V4L2_PIX_FMT_UYVY:
+      result = PIXEL_FORMAT_UYVY;
+      break;
     case V4L2_PIX_FMT_MJPEG:
     case V4L2_PIX_FMT_JPEG:
       result = PIXEL_FORMAT_MJPEG;