Fix VideoFrame::HasTextures() DCHECK.

Wrapped frame should always take precedent and the DCHECK prevents
wrapping frames that have textures.

R=ccameron, sandersd

Bug: None
Test: Passes existing tests.
Change-Id: Ibfbc5b329918a9223699dc6b01187a3b283d126c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2466838
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Commit-Queue: Dan Sanders <sandersd@chromium.org>
Auto-Submit: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816398}

media/base/video_frame.cc

@@ -1102,12 +1102,9 @@ bool VideoFrame::IsMappable() const {
 bool VideoFrame::HasTextures() const {
   // A SharedImage can be turned into a texture, and so it counts as a texture
   // in the context of this call.
-  if (mailbox_holders_[0].mailbox.IsSharedImage())
-    return true;
-
-  DCHECK(!wrapped_frame_ || !wrapped_frame_->HasTextures());
   return wrapped_frame_ ? wrapped_frame_->HasTextures()
-                        : !mailbox_holders_[0].mailbox.IsZero();
+                        : (mailbox_holders_[0].mailbox.IsSharedImage() ||
+                           !mailbox_holders_[0].mailbox.IsZero());
 }
 
 size_t VideoFrame::NumTextures() const {