Detach old frame on WebFrame::swap.

components/printing/renderer/print_web_view_helper.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/printing/renderer/print_web_view_helper.h"
 
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/json/json_writer.h"
@@ skipping 574 matching lines @@
  protected:
   // blink::WebViewClient override:
   virtual void didStopLoading();
 
   // blink::WebFrameClient override:
   virtual blink::WebFrame* createChildFrame(
       blink::WebLocalFrame* parent,
       blink::WebTreeScopeType scope,
       const blink::WebString& name,
       blink::WebSandboxFlags sandboxFlags);
+  // TODO(lfg): Remove this method once the blink patch lands.
   virtual void frameDetached(blink::WebFrame* frame);
+  virtual void frameDetached(blink::WebFrame* frame,
+                             blink::WebDetachReason reason);
 
  private:
   void CallOnReady();
   void ResizeForPrinting();
   void RestoreSize();
   void CopySelection(const WebPreferences& preferences);
 
   FrameReference frame_;
   blink::WebNode node_to_print_;
   bool owns_web_view_;
@@ skipping 130 matching lines @@
     blink::WebLocalFrame* parent,
     blink::WebTreeScopeType scope,
     const blink::WebString& name,
     blink::WebSandboxFlags sandboxFlags) {
   blink::WebFrame* frame = blink::WebLocalFrame::create(scope, this);
   parent->appendChild(frame);
   return frame;
 }
 
 void PrepareFrameAndViewForPrint::frameDetached(blink::WebFrame* frame) {
+  frameDetached(frame, blink::WebDetachReason::Remove);
+}
+
+void PrepareFrameAndViewForPrint::frameDetached(blink::WebFrame* frame,
+                                                blink::WebDetachReason reason) {
+  DCHECK(reason == blink::WebDetachReason::Remove);
   if (frame->parent())
     frame->parent()->removeChild(frame);
   frame->close();
 }
 
 void PrepareFrameAndViewForPrint::CallOnReady() {
   return on_ready_.Run();  // Can delete |this|.
 }
 
 void PrepareFrameAndViewForPrint::RestoreSize() {
@@ skipping 1312 matching lines @@
       blink::WebConsoleMessage::LevelWarning, message));
   return false;
 }
 
 void PrintWebViewHelper::ScriptingThrottler::Reset() {
   // Reset counter on successful print.
   count_ = 0;
 }
 
 }  // namespace printing