Move DisownOpener to RenderFrameHost / RenderFrameProxyHost.

content/browser/renderer_host/render_view_host_impl.cc

Index: content/browser/renderer_host/render_view_host_impl.cc
diff --git a/content/browser/renderer_host/render_view_host_impl.cc b/content/browser/renderer_host/render_view_host_impl.cc
index 0b5465195bc22a59fcc9f91f4755056428176763..d15dab302f4e7a4a67d8e251c2c19b33ac774a25 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -1351,13 +1351,6 @@ WebPreferences RenderViewHostImpl::GetWebkitPreferences() {
   return *web_preferences_;
 }
 
-void RenderViewHostImpl::DisownOpener() {
-  // This should only be called when swapped out.
-  DCHECK(IsSwappedOut());
-
-  Send(new ViewMsg_DisownOpener(GetRoutingID()));
-}
-
 void RenderViewHostImpl::UpdateWebkitPreferences(const WebPreferences& prefs) {
   web_preferences_.reset(new WebPreferences(prefs));
   Send(new ViewMsg_UpdateWebPreferences(GetRoutingID(), prefs));