When we run tests in parallel (and probably occasionally when we don't), we
sometimes wind up getting a DOMContentLoaded event for about:blank before we
actually start loading the background page, which causes tests which rely on
the background page being loaded to fail.
This also fixes some noisy warnings from XPIProvider which make actual issues
more difficult to diagnose.
MozReview-Commit-ID: 4CiccISJ7Pt
This patch was autogenerated by my decomponents.py
It covers almost every file with the extension js, jsm, html, py,
xhtml, or xul.
It removes blank lines after removed lines, when the removed lines are
preceded by either blank lines or the start of a new block. The "start
of a new block" is defined fairly hackily: either the line starts with
//, ends with */, ends with {, <
