cbui views: don't AX ignore title on permission prompts

This title provides the only display of which origin is requesting the
permission in question, so it should be accessibility-focusable to
allow the user to focus it and navigate within it, select it, etc.

Bug: 1099327
Change-Id: I4f8038f2623a79d10ba18cdd809b202110bc55ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2515182Reviewed-by: Abigail Klein <abigailbklein@google.com>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823620}

chrome/browser/ui/views/title_origin_label.cc

@@ -12,7 +12,6 @@ std::unique_ptr<views::Label> CreateTitleOriginLabel(
       std::make_unique<views::Label>(text, views::style::CONTEXT_DIALOG_TITLE);
   label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   label->SetCollapseWhenHidden(true);
-  label->GetViewAccessibility().OverrideRole(ax::mojom::Role::kIgnored);
 
   // Elide from head in order to keep the most significant part of the origin
   // and avoid spoofing. Note that in English, GetWindowTitle() returns a