Bug 930590 - Sync manifestdestiny with m-c;r=edmorley

--HG--
extra : rebase_source : 425d5dfa0ae7dbd356bbfe3947fc29838294c1bb
Bug 887832 - moz.build: Fix other remaining OS_TEST==arm references in the tree. r=gps
Bug 902755 - Fix deadlock in mozilla::ipc::GeckoChildProcessHost::LaunchAndWaitForProcessHandle exposed by turning on new tab page thumbnails. r=bent
Bug 924708 - Fix regression of report-only CSP's that use policy-uri. r=sstamm
Bug 929299 - Fix DrawTargetSkia to not copy and render in place. r=gwright
Bug 927734 - Loosen assertions about the contents of the style scope stack. r=dbaron

--HG--
extra : rebase_source : 6b9b7e4051bebeb7da640c7878229b1d014841dd
Bug 930270 - Don't initialize the ancestor filter for elements outside the document. r=dbaron

--HG--
extra : rebase_source : fa10a28a8bbd9eaf670f8133ccd81a9c706ebec7
Bug 928798 - Check nsSVGTextFrame2 for dirtiness when gettings it bounding box contribution. r=roc

--HG--
extra : rebase_source : e9173104309e532e9e6773132b9a867e47c3ea11