Scale menu position back to viewport in pepper plugin
pepper uses DIP, so it needs to be converted to viewport in use-zoom-for-dsf mode.
BUG=621943,485650
TEST=manual
Review-Url: https://codereview.chromium.org/2082893003
Cr-Commit-Position: refs/heads/master@{#401024}
(cherry picked from commit 9373922b7d01101f232c6ccfdedefd76e338e3ab)
Review URL: https://codereview.chromium.org/2094843002 .
Cr-Commit-Position: refs/branch-heads/2743@{#459}
Cr-Branched-From: 2b3ae3b8090361f8af5a611712fc1a5ab2de53cb-refs/heads/master@{#394939}
3 files changed
