pageDidScroll callback should be on the UI process client rather than (or in addition to) the web process client
Created attachment 71928 [details]
Attachment 71928 [details] did not pass style-queue:
Failed to run "['WebKitTools/Scripts/check-webkit-style']" exit_code: 1
WebKit2/UIProcess/API/C/WKPage.h:165: Extra space between WKPageDidDrawCallback and didDraw [whitespace/declaration] 
WebKit2/UIProcess/API/C/WKPage.h:166: Extra space between WKPageDidScrollCallback and pageDidScroll [whitespace/declaration] 
WebKitTools/WebKitTestRunner/TestController.cpp:125: One space before end of line comments [whitespace/comments] 
WebKitTools/WebKitTestRunner/TestController.cpp:211: One space before end of line comments [whitespace/comments] 
Total errors found: 4 in 11 files
If any of these errors are false positives, please file a bug against check-webkit-style.
Attachment 71928 [details] did not build on qt:
Build output: http://queues.webkit.org/results/4851012
But fix Qt.
Committed r70564: <http://trac.webkit.org/changeset/70564>