[Cocoa] The PageLoadState::Observer is not being set on iOS
https://bugs.webkit.org/show_bug.cgi?id=125051

Reviewed by Dan Bernstein.

* UIProcess/ios/WebPageProxyIOS.mm:
(WebKit::WebPageProxy::platformInitialize):
Add missing call to _finishInitialization.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159906 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Make more computed style helpers return PassRef.
<https://webkit.org/b/125043>

Reduce branchiness in computed style code by making more of the
file-local helpers return PassRef instead of PassRefPtr.

Reviewed by Anders Carlsson.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159907 268f45cc-cd09-0410-ab3c-d52691b4dbfc