Bug 874051 - Fix failing a11y tree tests, r=surkov
Bug 870461 - Improve l10n identifiers for new history subview buttons, r=dao
Bug 857886 - Use HiDPI images for Australis background tabs on OS X. r=fryn
Bug 823237 - Make the new tab button clip-path rectangular on top to prevent pointer-event gaps. r=Gijs
Automated merge with https://hg.mozilla.org/mozilla-central
Bug 865926 - Allow the nav-bar to overflow toolbaritems into an overflow panel. r=mconley.
Bug 871590 - Make unified titlebar / toolbar handling more robust. r=roc
Bug 676241 part 1: Don't draw rounded corners in -moz-appearance titlebar / toolbar rendering. r=josh
Bug 676241 part 2: Remove titlebar event redirection. r=josh
Bug 676241 part 3: Remove titlebar drawing. r=josh
Bug 676241 - Back out _drawTitleBar swizzling from UX (originally landed in bug 865374 and bug 868211) because it's no longer necessary.
Bug 676241 part 4: Make the window's contentView cover the whole window in drawsContentsIntoWindowFrame mode. r=smichaud
Bug 676241 part 5: Don't invalidate unnecessarily in OMTC mode. r=mattwoodrow
Bug 676241 part 6/9/11: Correct titlebar drawing. r=bgirard, r=smichaud, r=mattwoodrow
Bug 676241 part 7: Update comments.
Bug 676241 part 8: Remove alternate layer manager handling. r=mattwoodrow
Bug 875129 - Enable CustomizableUI debug logging. r=mconley
Bug 875139 - CustomizableUI.serializerHelper() should use spread operator instead of manually iterating over data. r=mconley
Bug 875441 - Don't keep reapplying the 2x scale in HiDPI mode when drawing the titlebar buttons. r=mattwoodrow
Mostly automated merge with https://hg.mozilla.org/mozilla-central