GitLab

refreshPageScaleFactor only gets called if the page scale constraints are dirty.
This happens when the page changes width but not when the height changes. This
cuased a bug where changing the window height only wouldn't resize the main
frame/outer viewport.

BUG=370218

Review URL: https://codereview.chromium.org/271593005

git-svn-id: svn://svn.chromium.org/blink/trunk@173672 bbb929c8-8fbe-4397-9dbb-9b2b20218538