GitLab

This CL adds supports for navigating to view destinations with fit
type 'FitR' (See table 151 in ISO 32000-1 standard for more details
about syntax of "FitR"), which focus the view on a rectangular window
specified by the FitR's coordinates parameters.

Bug: 55776,535978
Change-Id: I91353e7569830ba306b9d4cc31f32bfb9622c1df
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2391735Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Commit-Queue: Hui Yingst <nigi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813977}