Chrome build: tip of tree from 4/24

Repro steps:

1. Turn on downloading
2. navigate to badssl.com
3. long-press any of the links that should result in an error and select download link
4. Observe

Expected behavior: the link (which is to a webpage) should trigger offline pages to handle it, and then user notified that the page loading failed (because it's an error page)

Current behavior: this quietly creates a task called "download" and then quietly pauses it with no notification to user whatsoever

Corresponding log statement, from jianli@

04-24 13:48:17.602 14102 14102 E chromium: [ERROR:download_item_impl.cc(1984)] TransitionTo() from:INITIAL to:INTERRUPTED_TARGET_PENDING this = { id = 10 state = INTERRUPTED_TARGET_PENDING total = 0 received = 0 reason = NETWORK_FAILED paused = F resume_mode = USER_RESTART auto_resume_count = 0 danger = 0 all_data_saved = F last_modified = '' etag = '' has_download_file = false url_chain = 
04-24 13:48:17.602 14102 14102 E chromium: "https://untrusted-root.badssl.com/"
04-24 13:48:17.602 14102 14102 E chromium: current_path = ""
04-24 13:48:17.602 14102 14102 E chromium: target_path = "" referrer = "https://badssl.com/" site_url = "https://badssl.com/" }