Part of <rdar://problem/7273354> Halted plug-ins should restart on
mouseover

https://bugs.webkit.org/show_bug.cgi?id=30151

Reviewed by Darin Adler.

WebCore:

* plugins/PluginView.cpp:
(WebCore::PluginView::PluginView):
Initialize m_isHalted.

* plugins/PluginView.h:
(WebCore::PluginView::isHalted):
Return m_isHalted.

* plugins/win/PluginViewWin.cpp:
(WebCore::PluginView::halt):
Set m_isHalted to true.
(WebCore::PluginView::restart):
clear m_isHalted.

WebKit/win:

* Interfaces/IWebViewPrivate.idl:
Add isNodehaltedPlugin().

* WebView.cpp:
(WebView::isNodeHaltedPlugin):
From the IDOMNode, query for the DOMNode. From the DOMNode, get the
WebCore::Node. Get the node's renderer, and check whether it is a
RenderWidget. If so, get its Widget, and check whether it's a
PluginView. If so, return the result of PluginView::isHalted().

* WebView.h:
Declare isNodeHaltedPlugin().

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@49666 268f45cc-cd09-0410-ab3c-d52691b4dbfc