WKPage's setBackgroundExtendsBeyondPage API should be exposed through WKView and WKWebView.
Created attachment 224798 [details] Patch
Created attachment 224799 [details] Patch
Attachment 224799 [details] did not pass style-queue: ERROR: Source/WebKit2/UIProcess/API/Cocoa/WKViewPrivate.h:50: Missing spaces around = [whitespace/operators] [4] ERROR: Source/WebKit2/UIProcess/API/Cocoa/WKWebViewPrivate.h:72: Missing spaces around = [whitespace/operators] [4] Total errors found: 2 in 5 files If any of these errors are false positives, please file a bug against check-webkit-style.
http://trac.webkit.org/changeset/164453