Return early and decline analysis when linting within unsafe functions for must_root analysis.

Removes a handful of whitelist annotations obsoleted by this change. fixes #3658
Pass the timing information to PerformanceTiming rather than exposing methods.
some fixes for multiple-mode textinput
Add support for the 'rem' css unit
Switch android to glutin.
layout: Make table layout idempotent.

By "idempotent" I mean that later passes do not stomp on data from
earlier passes, so that we can run the passes individually for
incremental reflow. The main change here was to stop overwriting the
"minimum inline-size" field of each column with the column's computed
inline-size.
layout: Implement `outline` per CSS 2.1 § 18.4.

`invert` is not yet supported.

Objects that get layers will not yet display outlines properly. This is
because our overflow calculation doesn't take styles into account and
because layers are always anchored to the top left of the border box.
Since fixing this is work that is not related to outline *per se* I'm
leaving that to a followup and making a note in the code.
auto merge of #4189 : chmanchester/servo/rootlint, r=jdm

I think this matches the intent of the issue, I'm a rust/servo novice; any suggestions for improvements are welcome. Thanks!
auto merge of #4273 : wenderen/servo/multiple-line-textintput, r=Manishearth

#4258
auto merge of #4299 : pcwalton/servo/outline, r=mbrubeck

`invert` is not yet supported.

Objects that get layers will not yet display outlines properly. This is
because our overflow calculation doesn't take styles into account and
because layers are always anchored to the top left of the border box.
Since fixing this is work that is not related to outline *per se* I'm
leaving that to a followup and making a note in the code.

r? @SimonSapin
auto merge of #4327 : glennw/servo/glutin-android, r=larsbergstrom,larsbergstrom
auto merge of #4332 : Ms2ger/servo/performance, r=jdm
Remove glut port now that android glutin has landed.
auto merge of #4339 : pcwalton/servo/refactor-tables, r=mbrubeck

By "idempotent" I mean that later passes do not stomp on data from
earlier passes, so that we can run the passes individually for
incremental reflow. The main change here was to stop overwriting the
"minimum inline-size" field of each column with the column's computed
inline-size.

r? @mbrubeck
auto merge of #4340 : michaelwu/servo/css-rem-support, r=SimonSapin

This works on my simple test page https://people.mozilla.org/~mwu/rem.html , hopefully works on real pages too. Seems a little messy to add root_font_size directly to ComputedValues, but it didn't seem appropriate to add to the style structs.
Remove glut from update-cargo command.
auto merge of #4343 : glennw/servo/remove-glut, r=mbrubeck