Bug 927685 - Enable --ion-parallel-compile=on by default in the shell; r=jandem,sr=jorendorff

--HG--
extra : rebase_source : b416f0008ae96d4734ebd6d33be901f02a3ac560
Bug 893301. Rollup patch - new textures content. r=nical,nrc
Bug 893301. Don't use new textures content on b2g. r=bjacob,nical
Bug 702508 part 1: Support parsing/computing the CSS property "flex-wrap". r=dbaron
Bug 702508 part 2: Support parsing/computing the CSS property "align-content". r=dbaron
Bug 939905: Add support for CSS "flex-flow" shorthand property. r=heycam
Bug 939901 part 1: Make FlexboxAxisTracker aware that flex-wrap:wrap-reverse flips cross axis, and clean up related assertions/comments. r=mats
Bug 939901 part 2: Convert GenerateFlexItems into GenerateFlexLines, wrapping new FlexItems to new FlexLines when we run out of space in container's main axis. r=mats
Bug 939901 part 3: When generating FlexLines, wrap at page-breaks and at max-main-size. r=mats
Bug 939901 part 3.5: Honor "page-break-before" and "page-break-after" as flex line breaking requests. r=mats
Bug 939901 part 4: Make the flexbox reflow code loop over the FlexLines, rather than just working with one FlexLine. r=mats
Bug 939901 part 5: Honor 'align-content' in flexbox layout, for multi-line flex containers. r=mats
Bug 939901 part 6: Calculate the intrinsic min-width of a multi-line flex container by assuming a wrap between each flex item. r=mats
Bug 939901 part 7: Improve flex container baseline calculation from first FlexLine, in multi-line flex containers. r=mats
Bug 939901 part 8: Reftests for multi-line flexbox layout. r=mats

--HG--
rename : layout/reftests/flexbox/pagination/flexbox-unbreakable-child-1a.html => layout/reftests/flexbox/pagination/flexbox-unbreakable-child-1a-wrap.html
rename : layout/reftests/flexbox/pagination/flexbox-unbreakable-child-1b.html => layout/reftests/flexbox/pagination/flexbox-unbreakable-child-1b-wrap.html
rename : layout/reftests/flexbox/pagination/flexbox-unbreakable-child-1c.html => layout/reftests/flexbox/pagination/flexbox-unbreakable-child-1c-wrap.html
rename : layout/reftests/flexbox/pagination/flexbox-unbreakable-child-1d.html => layout/reftests/flexbox/pagination/flexbox-unbreakable-child-1d-wrap.html
rename : layout/reftests/w3c-css/submitted/flexbox/flexbox-baseline-multi-item-horiz-1-ref.html => layout/reftests/w3c-css/submitted/flexbox/flexbox-baseline-multi-line-horiz-1-ref.html
rename : layout/reftests/w3c-css/submitted/flexbox/flexbox-baseline-multi-item-horiz-1.html => layout/reftests/w3c-css/submitted/flexbox/flexbox-baseline-multi-line-horiz-1.html
rename : layout/reftests/w3c-css/submitted/flexbox/flexbox-baseline-multi-item-horiz-1-ref.html => layout/reftests/w3c-css/submitted/flexbox/flexbox-baseline-multi-line-horiz-2-ref.html
rename : layout/reftests/w3c-css/submitted/flexbox/flexbox-baseline-multi-item-horiz-1.html => layout/reftests/w3c-css/submitted/flexbox/flexbox-baseline-multi-line-horiz-2.html
Bug 945939 - Use the pre-split value when numbering values; r=sunfish

--HG--
extra : rebase_source : f5f67cd31653619806caab33a71eb8a1d48c7d62
Bug 927685 - Followup to fix bustage in --disable-threadsafe builds on a CLOSED TREE; r=bustage
Bug 697343 - Remove getElementIfPresent. r=Waldo
Bug 697343 - Introduce a slice hook to allow optimizing Array.prototype.slice for Proxies etc. r=jandem,bz
Bug 697343 - Add slice hook to DOM bindings like NodeList. r=peterv,bhackett