Detach old frame on WebFrame::swap.

components/html_viewer/html_document.cc

Index: components/html_viewer/html_document.cc
diff --git a/components/html_viewer/html_document.cc b/components/html_viewer/html_document.cc
index 4f678954e1683bd86c7e6c070b814e99e598b4de..c36f5d5a5b7c0d09fd4614fed245771fccec26f8 100644
--- a/components/html_viewer/html_document.cc
+++ b/components/html_viewer/html_document.cc
@@ -1,4 +1,4 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
+

[dcheng, 2015/06/01 21:41:11]

Typo?

[lfg, 2015/06/01 21:46:04]

Oops.

 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -255,6 +255,11 @@ blink::WebFrame* HTMLDocument::createChildFrame(
 }
 
 void HTMLDocument::frameDetached(blink::WebFrame* frame) {
+  frameDetached(frame, DetachType::Remove);
+}
+
+void HTMLDocument::frameDetached(blink::WebFrame* frame, DetachType type) {
+  DCHECK(type == DetachType::Remove);
   if (frame->parent())
     frame->parent()->removeChild(frame);