Chromium Mac: PDF: Scrollsbars should be visible when scrolling using the two finger gesture on Lion
https://bugs.webkit.org/show_bug.cgi?id=66599

Patch by Sailesh Agrawal <sail@chromium.org> on 2011-08-31
Reviewed by Darin Fisher.

Overlay scrollbars over a pdf wouldn't stay visible if a gesture was in progress. Normally we use a beginScrollGesture and endScrollGesture to keep the scrollbars visible. Unfortunately PDFs didn't handle gesture events so we didn't get the begin/end gesture events.

This change pipes gesture events to WebPluginContainerImpl if possible. This fixes this bug.

* src/WebPluginContainerImpl.cpp:
(WebKit::WebPluginContainerImpl::handleGestureEvent):
* src/WebPluginContainerImpl.h:
* src/WebViewImpl.cpp:
(WebKit::WebViewImpl::gestureEvent):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@94261 268f45cc-cd09-0410-ab3c-d52691b4dbfc