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..2b633b20681b6f97fb68b1437bfb51c936f7c605 100644
--- a/media/base/video_types.cc
+++ b/media/base/video_types.cc
@@ -14,6 +14,8 @@ std::string VideoPixelFormatToString(VideoPixelFormat format) {
       return "PIXEL_FORMAT_UNKNOWN";
     case PIXEL_FORMAT_I420:
       return "PIXEL_FORMAT_I420";
+    case PIXEL_FORMAT_I422:
+      return "PIXEL_FORMAT_I422";
     case PIXEL_FORMAT_YV12:
       return "PIXEL_FORMAT_YV12";
     case PIXEL_FORMAT_YV16:
@@ -73,6 +75,7 @@ bool IsYuvPlanar(VideoPixelFormat format) {
   switch (format) {
     case PIXEL_FORMAT_YV12:
     case PIXEL_FORMAT_I420:
+    case PIXEL_FORMAT_I422:
     case PIXEL_FORMAT_YV16:
     case PIXEL_FORMAT_YV12A:
     case PIXEL_FORMAT_YV24:
@@ -109,6 +112,7 @@ bool IsOpaque(VideoPixelFormat format) {
   switch (format) {
     case PIXEL_FORMAT_UNKNOWN:
     case PIXEL_FORMAT_I420:
+    case PIXEL_FORMAT_I422:
     case PIXEL_FORMAT_YV12:
     case PIXEL_FORMAT_YV16:
     case PIXEL_FORMAT_YV24: