The 'treatAsInitialValue' parameter in PageViewportControllerClient::setContentsScale() is not used by anyone. Can be dropped to make the code cleaner.
Created attachment 178530 [details] patch
Note that on Qt we might actually need to pass that flag through the delayed setting of the scale, since this information is lost which resulted in bugs in the double-tap-to-zoom logic: see https://bugs.webkit.org/show_bug.cgi?id=103889. But we can also add a separate function to clean the scale stack if needed, so I'm not opposing this clean-up.
Comment on attachment 178530 [details] patch Clearing flags on attachment: 178530 Committed r137149: <http://trac.webkit.org/changeset/137149>
All reviewed patches have been landed. Closing bug.