Revert "Ensure we properly set PageTransition for iframes."
This reverts commit
735aa03be45990a5e2feb3c38087e6f76eb920ac AKA refs/heads/master@{#326404}
Reverting because it caused a bug which is currently the top crasher on canary.
Original description: Ensure we properly set PageTransition for iframes.
We currently don't set subframe navigations as manual when it isn't the first
navigation of the iframe. Also, we don't propagate the state correctly in the
case of a cross-process transition.
Original Review URL: https://codereview.chromium.org/
1002953004
Original Cr-Commit-Position: refs/heads/master@{#326404}
TBR=creis@chromium.org, japhet@chromium.org
BUG=464014,480839
Review URL: https://codereview.chromium.org/
1108863002
Cr-Commit-Position: refs/heads/master@{#327100}