Add PIXEL_FORMAT_I422.

media/video/gpu_memory_buffer_video_frame_pool.cc

Index: media/video/gpu_memory_buffer_video_frame_pool.cc
diff --git a/media/video/gpu_memory_buffer_video_frame_pool.cc b/media/video/gpu_memory_buffer_video_frame_pool.cc
index 10fc05906c717bd4c36c91f9d0fba80fc53e471c..073ea4fa7913ee9b506dd7bf4baae28b1e9cbb90 100644
--- a/media/video/gpu_memory_buffer_video_frame_pool.cc
+++ b/media/video/gpu_memory_buffer_video_frame_pool.cc
@@ -428,6 +428,7 @@ void GpuMemoryBufferVideoFramePool::PoolImpl::CreateHardwareFrame(
     case PIXEL_FORMAT_YUV444P12:
     case PIXEL_FORMAT_Y8:
     case PIXEL_FORMAT_Y16:
+    case PIXEL_FORMAT_I422:
     case PIXEL_FORMAT_UNKNOWN:
       frame_ready_cb.Run(video_frame);
       return;