Move DisownOpener to RenderFrameHost / RenderFrameProxyHost.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 7c363459516c509561bd2b3ba38caa253d8b5acd..1177cd0ccc16223dbdc3fc67739a5adb9b2b05c5 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -777,6 +777,7 @@ bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
                         OnAddStyleSheetByURL)
     IPC_MESSAGE_HANDLER(FrameMsg_SetAccessibilityMode,
                         OnSetAccessibilityMode)
+    IPC_MESSAGE_HANDLER(FrameMsg_DisownOpener, OnDisownOpener)
 #if defined(OS_MACOSX)
     IPC_MESSAGE_HANDLER(InputMsg_CopyToFindPboard, OnCopyToFindPboard)
 #endif
@@ -1272,6 +1273,16 @@ void RenderFrameImpl::OnSetAccessibilityMode(AccessibilityMode new_mode) {
 #endif
 }
 
+void RenderFrameImpl::OnDisownOpener() {
+  // TODO(creis): We should only see this for main frames for now.  To support
+  // disowning the opener on subframes, we will need to move WebContentsImpl's
+  // opener_ to FrameTreeNode.
+  CHECK(!frame_->parent());
+
+  if (frame_->opener())
+    frame_->setOpener(NULL);
+}
+
 void RenderFrameImpl::OnReload(bool ignore_cache) {
   frame_->reload(ignore_cache);
 }