Fix zoom PDF param.

The "left" param was ignored because it was applied before the zoom,
and the page still fit in the window at 1x zoom. Scrolling on x was
non-op at this zoom level.

Bug: 319910,64309
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I7b476c018f9972f2b1e0075e933e6489f12e6974
Reviewed-on: https://chromium-review.googlesource.com/817690
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523223}
5 files changed