Fix fullscreen pepper leak

BUG=None
TEST=Pepper Flash on Youtube. Go fullscreen and back. Obeserve with xrestop that X resources aren't leaked


Review URL: http://codereview.chromium.org/7670018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@97115 0039d316-1c4b-4281-b951-d872f2087c98

content/renderer/render_widget_fullscreen_pepper.cc

@@ -261,6 +261,7 @@ void RenderWidgetFullscreenPepper::Destroy() {
   // plugin_ to NULL to avoid calling into a dangling pointer e.g. on Close().
   plugin_ = NULL;
   Send(new ViewHostMsg_Close(routing_id_));
+  Release();
 }
 
 void RenderWidgetFullscreenPepper::DidChangeCursor(