GitLab

crbug.com/1123934: Handle errors in WebUI
crbug.com/1123942: Pass attachments to WebUI
crbug.com/1123943: Pass contact name to WebUI

Bug: None
Change-Id: I5b6c1552f730733408337373f995ad05c10e9dfe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2389204Reviewed-by: James Vecore <vecore@google.com>
Commit-Queue: Richard Knoll <knollr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803885}