Bug 779863 - check in testcase for bug 778603 (r=me)

--HG--
extra : rebase_source : 64416df83a09c0ebd6253cf2e1699f5e4243dc73
Bug 871942 - Don't synchronously stop plugins in DestroyContent. r=benjamin
Bug 871942 - Check for closing-window reentrance in nsWebShellWindow::RequestWindowClose. r=jst
Bug 875512 - Part 2: Followup mach bustage; r=me
Bug 873720 - Part 1: Annotate build output with machine readable markers; r=ted
Bug 873720 - Part 2: Move mach's build monitoring logic into mozbuild core; r=ted
Bug 873720 - Part 3: Track build state in build monitor; r=ted
Bug 873720 - Part 4: Display a build progress indicator; r=ted
Bug 873720 - Part 5: Only call into subtiers that perform work; r=ted
Bug 868300, use cycle collector to break the cycles between ValidityState and its owner, r=mounir

--HG--
extra : rebase_source : 7ae7d0cfdca60d71870ac7b9d7a1210c9e1f6ec3
Bug 860951 - Make newlines work in XUL alerts. r=Unfocused

--HG--
extra : rebase_source : a18b39cad30e711e033c91a2e67979884a8c68cf
Bug 860951 - Follow up, fixing indentation. DONTBUILD
Bug 875512 - Part 2b: More bustage fix to original patch; r=ted