Address FIXME in CreateWindow: use FocusController to change focus
Address FIXME in CreateWindow: use FocusController to change focus

The main difference is that going via the ChromeClient will also raise
the window. This is, however, undesirable, as a page can open its own
frames without limitations, and therefore can use this to create
popunders

BUG=343064
R=mkwst@chromium.org

Review URL: https://codereview.chromium.org/158953009

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@167000 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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