[WebCodecs] Fix blogpost demo on ChromeOS and Android

ChromeOS only uses 1 mailbox for all yuv planes, while the current
VideoFrameYUVConverter assumes 1 mailbox for each plane. So that's
the cause of the bug. To fix that, we have to use CopySubTexture
instead.

This also adds ABGR video frame support for Android.

Bug: 1137947, 1135073
Change-Id: I600df595cf849aeee01ed39e2e36b2297dfc2d33
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2486568
Commit-Queue: Jie A Chen <jie.a.chen@intel.com>
Reviewed-by: Eugene Zemtsov <eugene@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819257}

third_party/blink/renderer/modules/webcodecs/video_frame.cc

@@ -345,8 +345,9 @@ ScriptPromise VideoFrame::CreateImageBitmap(ScriptState* script_state,
 
   if ((local_frame->IsMappable() || local_frame->HasTextures()) &&
       (local_frame->format() == media::PIXEL_FORMAT_I420 ||
-       (local_frame->format() == media::PIXEL_FORMAT_NV12 &&
-        local_frame->HasTextures()))) {
+       (local_frame->HasTextures() &&
+        (local_frame->format() == media::PIXEL_FORMAT_NV12 ||
+         local_frame->format() == media::PIXEL_FORMAT_ABGR)))) {
     scoped_refptr<StaticBitmapImage> image;
     gfx::ColorSpace gfx_color_space = local_frame->ColorSpace();
     gfx_color_space = gfx_color_space.GetWithMatrixAndRange(
@@ -397,8 +398,17 @@ ScriptPromise VideoFrame::CreateImageBitmap(ScriptState* script_state,
       dest_holder.sync_token = shared_image_interface->GenUnverifiedSyncToken();
       dest_holder.texture_target = GL_TEXTURE_2D;
 
+      if (local_frame->NumTextures() == 1) {
+        ri->WaitSyncTokenCHROMIUM(dest_holder.sync_token.GetConstData());
+        ri->CopySubTexture(
+            local_frame->mailbox_holder(0).mailbox, dest_holder.mailbox,
+            GL_TEXTURE_2D, 0, 0, 0, 0, local_frame->coded_size().width(),
+            local_frame->coded_size().height(), GL_FALSE, GL_FALSE);
+      } else {
         media::VideoFrameYUVConverter::ConvertYUVVideoFrameNoCaching(
             local_frame.get(), raster_context_provider.get(), dest_holder);
+      }
+
       gpu::SyncToken sync_token;
       ri->GenUnverifiedSyncTokenCHROMIUM(sync_token.GetData());