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
Move major DevTools files to new directories using the following steps:
hg mv browser/devtools devtools/client
hg mv toolkit/devtools/server devtools/server
hg mv toolkit/devtools devtools/shared
No other changes are made.
