Disallow access to opaque CSS responses.

Bug: 848786
Change-Id: Ie53fbf644afdd76d7c65649a05c939c63d89b4ec
Reviewed-on: https://chromium-review.googlesource.com/1088335
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565537}
bool CSSStyleSheet::SheetLoaded() {
  DCHECK(owner_node_);
  SetLoadCompleted(owner_node_->SheetLoaded());
  return load_completed_;
}

bool CSSStyleSheet::SheetLoaded() {
  DCHECK(owner_node_);
  SetLoadCompleted(owner_node_->SheetLoaded());
  return load_completed_;
}
