We shouldn't start a swipe immediately upon very small scrolls in the correct direction, because we don't want to get the user trapped in a swipe. Instead, we should have some hysteresis mechanism to make sure the user really wants to swipe.
<rdar://problem/15876822>
Created attachment 228422 [details] patch
Comment on attachment 228422 [details] patch Attachment 228422 [details] did not pass mac-wk2-ews (mac-wk2): Output: http://webkit-queues.appspot.com/results/5221395600506880 New failing tests: media/W3C/audio/canPlayType/canPlayType_application_octet_stream_with_codecs_1.html
Created attachment 228452 [details] Archive of layout-test-results from webkit-ews-16 for mac-mountainlion-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: webkit-ews-16 Port: mac-mountainlion-wk2 Platform: Mac OS X 10.8.5
Comment on attachment 228422 [details] patch View in context: https://bugs.webkit.org/attachment.cgi?id=228422&action=review > Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm:271 > + // If a single scroll event in the sequence is "too vertical", we will stop tracking this > + // as a potential swipe until we get another "begin" event. This comment isn't quite right.
http://trac.webkit.org/changeset/166941