Bug 909305 - Replace mozilla-banner.gif with a plain blue image in 163504-2*.html since we aren't trying to test individual pixel differences in resized image painting there. r=tn, a=test-only
Bug 919482 - Replace mozilla-banner.gif with a plain blue image in 163504-1*.html since we aren't trying to test individual pixel differences in resized image painting there. r=tn, a=test-only
Bug 987076 - Construct HTMLMediaElement::mTextTrackManager lazily. r=roc, a=1.3+

* Remove the TextTrackManager's initialization from the MediaElement's
ctor and add a getter that creates it if we don't have it yet. The public
functions exposed on the MediaElement's IDL now call this getter.
* Also remove the const qualifier from HTMLMediaElement::TextTracks()
as we don't really need it and this function now needs to call
GetOrCreateTextTrackManager() which is non-const.
Bug 988015 - Disable Seer on b2g. r=jduell, a=lsblakk