GitLab

This CL changes `scroll_offset_at_last_raster_`, `scroll_offset_`, and
BoundScrollOffsetToDocument() from pp::FloatPoint/pp::Point to
gfx::PointF/gfx::Point, so that they can be migrated to
PdfViewPluginBase later.

Bug: 1101101
Change-Id: Iaa845e45b7d6a1d735fb44de3f7194df43b0f32f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2626926
Commit-Queue: Hui Yingst <nigi@chromium.org>
Reviewed-by: Daniel Hosseinian <dhoss@chromium.org>
Reviewed-by: K. Moon <kmoon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844198}