media: Introduce Y8 and Y16 video pixel format

cc/resources/video_resource_updater.cc

Index: cc/resources/video_resource_updater.cc
diff --git a/cc/resources/video_resource_updater.cc b/cc/resources/video_resource_updater.cc
index 1f551669908d6c55923b17005412bd14a49889ab..b91ab06925b697b345098a9321c42c37c096a6d7 100644
--- a/cc/resources/video_resource_updater.cc
+++ b/cc/resources/video_resource_updater.cc
@@ -84,6 +84,8 @@ VideoFrameExternalResources::ResourceType ResourceTypeForVideoFrame(
     case media::PIXEL_FORMAT_YUV420P10:
     case media::PIXEL_FORMAT_YUV422P10:
     case media::PIXEL_FORMAT_YUV444P10:
+    case media::PIXEL_FORMAT_Y8:
+    case media::PIXEL_FORMAT_Y16:
     case media::PIXEL_FORMAT_UNKNOWN:
       break;
   }
@@ -322,6 +324,7 @@ VideoFrameExternalResources VideoResourceUpdater::CreateForSoftwarePlanes(
     case media::PIXEL_FORMAT_RGB32:
     case media::PIXEL_FORMAT_MJPEG:
     case media::PIXEL_FORMAT_MT21:
+    case media::PIXEL_FORMAT_Y8:
       bits_per_channel = 8;
       break;
     case media::PIXEL_FORMAT_YUV420P9:
@@ -334,6 +337,15 @@ VideoFrameExternalResources VideoResourceUpdater::CreateForSoftwarePlanes(
     case media::PIXEL_FORMAT_YUV444P10:
       bits_per_channel = 10;
       break;
+    case media::PIXEL_FORMAT_Y16:
+      bits_per_channel = 16;
+      break;
+  }
+
+  // TODO(dshwang): support PIXEL_FORMAT_Y16. crbug.com/624436
+  if (bits_per_channel == 16) {
+    NOTREACHED();

[danakj, 2016/09/22 20:55:20]

Please don't both DCHECK and handle the case. Choose one. Return or DCHECK.

[dshwang, 2016/09/26 13:02:23]

Done. Choose DCHECK

+    return VideoFrameExternalResources();
   }
 
   // Only YUV software video frames are supported.