Bug 872235. We get less asserts when we disable bug 689623, so revert the assertion bump from that bug. a=me
Bug 873888 - Wait for construction of tracks before returning onAddStream. r=jesup, a=akeybl
Bug 876282 - Add unprefixed cancelAnimationFrame. r=bz, a=lsblakk

--HG--
rename : content/base/test/test_bug647518.html => content/base/test/test_bug876282.html
Bug 866501 - Crash when long pressing url-bar on HTC phones running GB. r=mfinkle, a=lsblakk
Bug 871390 - Update WebGL canvases async, not 2D ones. r=mattwoodrow, a=lsblakk
Bug 871066 - Fix CommandUtils is not defined when opening devtools with Simulator 3.0 installed. r=harth, a=lsblakk
Bug 874825 - Correctly set HAS_ARGS_OBJ flag when bailing out to baseline. r=djvj, a=lsblakk
Bug 876313 - [New Tab Page] Unpinning a site doesn't update pref. r=jaws, a=bajaj
Bug 867608 - Reuse width value on BrowserToolbar's updateForwardButton(). r=mfinkle, a=lsblakk
Bug 867608 - Fix animation margins for forward button. r=mfinkle, a=lsblakk