https://bugs.webkit.org/show_bug.cgi?id=113173

Patch by Jae Hyun Park <jae.park@company100.net> on 2013-08-21
Reviewed by Anders Carlsson.

m_platformLayer in PluginView has been removed in r121710, but there are
still some leftover code path related to m_platformLayer. This patch
removes unused code path.

No new tests, removing unused code paths.

* plugins/PluginView.h:
(PluginView):
* plugins/qt/PluginViewQt.cpp:
(WebCore::PluginView::updatePluginWidget):
(WebCore::PluginView::paint):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@154385 268f45cc-cd09-0410-ab3c-d52691b4dbfc