Use updated interest rect when layer needs repainting.
This ensures that repaints don't use a larger rect than necessary, while also ensuring that a new interest rect that is contained within the previous interest rect doesn't cause a repaint on its own.
Currently, the previous interest rect is used if it didn't change too much even when the layer needs repainting, as introduced in https://codereview.chromium.org/1441973003. The original rationale behind this behavior was to ensure consistency between blink and cc. With cc refactorings, this should not be an issue any longer.
BUG=646410
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Review-Url: https://codereview.chromium.org/2332273003
Cr-Commit-Position: refs/heads/master@{#418291}
2 files changed
