This removes about 2/3 of the occurrences of nsXPIDLString in the tree. The
places where nsXPIDLStrings are null-checked are replaced with |rv| checks.
The patch also removes a couple of unused declarations from
nsIStringBundle.idl.
Note that nsStringBundle::GetStringFromNameHelper() was merged into
GetStringFromName(), because they both would have had the same signature.
Even for very small layers we want to avoid doing work on the main
thread.
At the same time, however, increase the minimum active layer size for
animations which come from restyles. These involve the main thread
anyway, so there is less to be gained from using an active
layer. Since switching items between active and inactive can have
large knock-on effects, we want to make sure it really is worth making
the layer active.
MozReview-Commit-ID: 8N6xlVW4Dp3
Note that the default values of the prefs are chosen so as to preserve
existing behaviour.
The patch also updates a user-visible warning message, which was
already out of date as of bug 1274991.
MozReview-Commit-ID: AqBBoIucShT
This patch adds a new performance warning type for the case when we start
a transform animation at the same time as an animation that includes a
geometric property. In that case we run the transform animation on the main
thread so that it is synchronized with the geometric animation (which we can
only run on the main thread).
This differs from CompositorAnimationWarningTransformWithGeometricProperties
in that this applies across different elements whilst the existing warning
only covers the case when the same animation animates both transform and
geometric properties.
MozReview-Commit-ID: EcOMo4VDAYY
