Examples: move markAsLaidOut() to just before the return, so the asserts work

Examples: move markAsLaidOut() to just before the return, so the asserts work
Specs: introduce layoutDescendants() to avoid work when a layout
manager is unaffected by its childrens' intrinsic dimensions
Examples: update for layoutDescendants() change
Specs: add "lifetime" to resolver settings so that a transition can
avoid having to dirty every consumer of the property every frame when
it only needs to update the objects that are changing that frame
Specs: expose the parents on AbstractStyleDeclarationList subclasses
Specs: fix documentation around autoreap
Specs: fix definition of setProperty()
Specs: clean up the dimension-related logic of layout managers

Committed: https://chromium.googlesource.com/external/mojo/+/cb520e20671568b4d7d287cb8d14df9e90ad95df

[Hixie, 2015-01-13 19:25:27]

Committed patchset #1 (id:1) manually as
cb520e20671568b4d7d287cb8d14df9e90ad95df.