Add stubbed out PluginView class

Add stubbed out PluginView class
https://bugs.webkit.org/show_bug.cgi?id=41879

Reviewed by Sam Weinig.

WebCore:

Export functions needed by WebKit2.

* WebCore.exp.in:

WebKit2:

* WebKit2.xcodeproj/project.pbxproj:
Add PluginView.cpp and PluginView.h

* WebProcess/Plugins/PluginView.cpp: Added.
(WebKit::PluginView::PluginView):
(WebKit::PluginView::~PluginView):
(WebKit::PluginView::setFrameRect):
(WebKit::PluginView::paint):
(WebKit::PluginView::viewGeometryDidChange):
(WebKit::PluginView::invalidateRect):
Stub out these functions.

* WebProcess/Plugins/PluginView.h: Added.
(WebKit::PluginView::create):
* WebProcess/WebCoreSupport/WebFrameLoaderClient.cpp:
(WebKit::WebFrameLoaderClient::createPlugin):
Create a plug-in view.

* win/WebKit2.vcproj:
Add PluginView.cpp and PluginView.h.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@62809 268f45cc-cd09-0410-ab3c-d52691b4dbfc