We need to first add draggable property to WebDraggableRegion before we can land the following patch to switch to new draggable region syntax and behavior: https://bugs.webkit.org/show_bug.cgi?id=97156 This is because without WebDraggableRegion::draggable property, Chromium side code cannot enable the changes to support new syntax side by side with old syntax.
Created attachment 166326 [details] Proposed Patch
Please wait for approval from abarth@webkit.org, dglazkov@chromium.org, fishd@chromium.org, jamesr@chromium.org or tkent@chromium.org before submitting, as this patch contains changes to the Chromium public API. See also https://trac.webkit.org/wiki/ChromiumWebKitAPI.
Comment on attachment 166326 [details] Proposed Patch https://code.google.com/p/chromium/issues/detail?id=231386