Fix for OOP iframes not rendering with virtual-viewport enabled.
Fix for OOP iframes not rendering with virtual-viewport enabled.

Since virtual-viewport was enabled, the main FrameView gets its size after
a layout in WebViewImpl::refreshPageScaleAfterLayout. This method is guarded
by mainFrame()->isLocalFrame() so it early-outs with --site-per-process.
This patch moves the FrameView resize to WebViewImpl::layoutUpdated (where
it more appropriately belongs anyway).

BUG=444592

Review URL: https://codereview.chromium.org/831203005

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@187996 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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