[SPv2] Renaming and refactor about raster invalidation tracking

- Shorten names by removing redundant qualifiers.
- Separate the code path for tracking to improve performance of the normal path.

BUG=644358
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2868283003
Cr-Commit-Position: refs/heads/master@{#471207}
12 files changed