Migrate change to BookmarkAppHelper::OnIconsDownloaded to WebAppInstallDialogCallback

Bug: 952668, 915043
Change-Id: Ic086de3d8a26625613bf20f884d788043fe38acf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1580994
Reviewed-by: Alexey Baskakov <loyso@chromium.org>
Commit-Queue: Alexey Baskakov <loyso@chromium.org>
Auto-Submit: Alan Cutter <alancutter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654351}
1 file changed