GitLab

Allow ToolbarButton to have metadata and builder support. Also add
support for gfx::Insets in type conversions.

Bug: 1130078
Change-Id: Ib98aede08866dc0bf88ddab1a3c0a70de3959685
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2436514
Commit-Queue: Wei Li <weili@chromium.org>
Reviewed-by: Robert Liao <robliao@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813458}