Allow replicated origins to be updated.
Allow replicated origins to be updated.

Previously, replicated origins were set only when RemoteFrames were
created.  However, https://codereview.chromium.org/1098763003 is 
going to send origin updates to frame proxies when the frame 
navigates to another origin, so this check is no longer needed.

BUG=426512

Review URL: https://codereview.chromium.org/1096873002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@194229 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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