Add PIXEL_FORMAT_I422.

media/base/video_types.cc

Index: media/base/video_types.cc
diff --git a/media/base/video_types.cc b/media/base/video_types.cc
index 0f2d540a1aaa2fbcaf19bcf31c89c963e217866f..25fdbf5049ab6e05d03c3fb16badcab896749498 100644
--- a/media/base/video_types.cc
+++ b/media/base/video_types.cc
@@ -64,6 +64,8 @@ std::string VideoPixelFormatToString(VideoPixelFormat format) {
       return "PIXEL_FORMAT_Y8";
     case PIXEL_FORMAT_Y16:
       return "PIXEL_FORMAT_Y16";
+    case PIXEL_FORMAT_I422:
+      return "PIXEL_FORMAT_I422";
   }
   NOTREACHED() << "Invalid VideoPixelFormat provided: " << format;
   return "";
@@ -88,6 +90,7 @@ bool IsYuvPlanar(VideoPixelFormat format) {
     case PIXEL_FORMAT_YUV420P12:
     case PIXEL_FORMAT_YUV422P12:
     case PIXEL_FORMAT_YUV444P12:
+    case PIXEL_FORMAT_I422:
       return true;
 
     case PIXEL_FORMAT_UNKNOWN:
@@ -131,6 +134,7 @@ bool IsOpaque(VideoPixelFormat format) {
     case PIXEL_FORMAT_YUV444P12:
     case PIXEL_FORMAT_Y8:
     case PIXEL_FORMAT_Y16:
+    case PIXEL_FORMAT_I422:
       return true;
     case PIXEL_FORMAT_YV12A:
     case PIXEL_FORMAT_ARGB: