This commit does a couple of things:
- move whereToOpenLink and getRootEvent implementations into BrowserUtils,
so they can be used from the child process.
- forward callers in utilityOverlay.js to the BrowserUtils ones
(bug 1742889 will get rid of the forwarding and update all the callers;
we might be able to get this and bug 1739929 into beta if risk is low
enough, and touching a bunch of extra files really doesn't help with
that)
- move the lazy-load of BrowserUtils from browser.js to utilityOverlay.js
This is safe because everywhere that loads browser.js also loads
utilityOverlay.js. It's needed because there are some places that use
utilityOverlay.js but not browser.js, and so now they need access to
BrowserUtils.jsm.
- use whereToOpenLink to determine if we should avoid consuming the transient
user gesture activation in the child click handling code.
- add an automated test based on the testcase in the bug.
When working on this, I initially put the check using whereToOpenLink in
the toplevel of the function, and then when I ran places test to check that
I hadn't broken any places consumers of whereToOpenLink or getRootEvent,
realized that I had broken `browser_markPageAsFollowedLink.js`, because it
relies on "normal" (ie no modifier key, left button) link clicks making it
to ClickHandlerParent.jsm . I filed bug 1742894 about this. I've not tried
to fix that here, instead I've tried to ensure that paths through this
function are as untouched as possible while still fixing bug 1739929 and
bug 1742801.
Differential Revision: https://phabricator.services.mozilla.com/D132102
17c9c06a19