Fix PDF find-in-page tickmarks.

This moves tickmark overriding and invalidation from LocalFrameView to
LayoutView, and connects PaintLayerScrollableArea correctly.

Bug: 847236
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: I6b5d5d5cb94a5fb09a67553ab147245e0ca80843
Reviewed-on: https://chromium-review.googlesource.com/1077370
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Steve Kobes <skobes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562674}
11 files changed