GuestView: Cleanup on Embedder process swap

extensions/browser/guest_view/guest_view_base.cc

 // Copyright 2014 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 "extensions/browser/guest_view/guest_view_base.h"
 
 #include "base/lazy_instance.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
@@ skipping 52 matching lines @@
   }
 
   virtual ~EmbedderWebContentsObserver() {
   }
 
   // WebContentsObserver implementation.
   virtual void WebContentsDestroyed() OVERRIDE {
     Destroy();
   }
 
+  virtual void RenderViewHostChanged(
+      content::RenderViewHost* old_host,
+      content::RenderViewHost* new_host) OVERRIDE {
+    Destroy();
+  }
+
   virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE {
     Destroy();
   }
 
  private:
   bool destroyed_;
   GuestViewBase* guest_;
 
   void Destroy() {
     if (destroyed_)
@@ skipping 360 matching lines @@
 }
 
 // static
 void GuestViewBase::RegisterGuestViewTypes() {
   AppViewGuest::Register();
   WebViewGuest::Register();
   ExtensionsAPIClient::Get()->RegisterGuestViewTypes();
 }
 
 }  // namespace extensions