[WK2] Remove build warnings by -Wunused-parameter
https://bugs.webkit.org/show_bug.cgi?id=115344

Patch by Jinwoo Song <jinwoo7.song@samsung.com> on 2013-04-29
Reviewed by Noam Rosenthal.

Fix build warnigs -Wunused-parameter.

* UIProcess/CoordinatedGraphics/WebView.cpp:
(WebKit::WebView::createContextMenuProxy):
* UIProcess/DrawingAreaProxy.h:
(WebKit::DrawingAreaProxy::waitForPossibleGeometryUpdate):
* UIProcess/WebPageProxy.cpp:
(WebKit::WebPageProxy::connectionWillClose):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149279 268f45cc-cd09-0410-ab3c-d52691b4dbfc