Bug 1011163 - Remove the border which isn't essential for the test since it caused orange due to focus issues. r=me
Bug 1009263 - Add nsCheapSets::Clear() method that removes all entries and return it to minimal size in terms of memory use.  r=bsmedberg
Bug 1008908 - Remove assignment since the value isn't used.  r=smontagu
Bug 1011879 - Fixup code offsets correctly when pushing jump targets in irregexp, r=jandem.
Bug 957928: Gecko Media Plugins implementation. No consumers in Gecko yet. r=bent
Back out a4b51aff4b3c (bug 957928) for build bustage
CLOSED TREE
Merge m-c to m-i
Bug 1005660: Add an "early freeze" step, to freeze flex items that clearly can't grow (or shrink, if we're shrinking). r=mats
Bug 1011311: Drop no-longer-necessary check on availableFreeSpace's sign, in ResolveFlexibleLengths(). r=mats
Bug 957928: Gecko Media Plugins implementation. No consumers in Gecko yet. r=bent
Bug 1009590: Deal with non-ui-thread IPDL usage on Windows. r=bent
Bug 1009616: Specify async video separately for content-processes. r=nical
Bug 896896. Use MsgWaitForMultipleObjectsEx instead of WaitMessage. r=roc
Bug 994318 - Implement caching for ShouldLoad to speed things up.  r=ckerschb,grobinson
Bug 994320 - Implement permitsAncestry CSP in C++. r=ckerschb,grobinson
Bug 929274 - 'InvalidStateError when accessing transaction.error after aborted transaction'. Patch by bent & Shihua Zheng <szheng@mozilla.com>, r=janv, r=khuey.
Backed out changeset f4964171a9c0 (bug 994320) and changeset a4655f5da435 (bug 994318) for bustage.
CLOSED TREE
Merge m-c to inbound on a CLOSED TREE.
Bug 1013006 - Ignore actionCount on text leaves when checking if the subtree is flat. r=yzen
Bug 1009272 - [css-grid] Add some sanity checks for the grid container child frame lists.  r=dholbert