Create swapped-out opener RVHs after a process swap.

content/public/browser/site_instance.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_SITE_INSTANCE_H_
 #define CONTENT_PUBLIC_BROWSER_SITE_INSTANCE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
@@ skipping 64 matching lines @@
   // BrowsingInstance, creating a new SiteInstance if necessary.  This ensures
   // that a BrowsingInstance only has one SiteInstance per site, so that pages
   // in a BrowsingInstance have the ability to script each other.  Callers
   // should ensure that this SiteInstance becomes ref counted, by storing it in
   // a scoped_refptr.  (By having this method, we can hide the BrowsingInstance
   // class from the rest of the codebase.)
   // TODO(creis): This may be an argument to build a pass_refptr<T> class, as
   // Darin suggests.
   virtual SiteInstance* GetRelatedSiteInstance(const GURL& url) = 0;
 
+  // Returns whether the given SiteInstance is in the same BrowsingInstance as
+  // this one.  If so, JavaScript interactions that are permitted across
+  // origins (e.g., postMessage) should be supported.
+  virtual bool IsRelatedSiteInstance(const SiteInstance* instance) = 0;
+
   // Factory method to create a new SiteInstance.  This will create a new
   // new BrowsingInstance, so it should only be used when creating a new tab
   // from scratch (or similar circumstances).  Callers should ensure that
   // this SiteInstance becomes ref counted, by storing it in a scoped_refptr.
   //
   // The render process host factory may be NULL. See SiteInstance constructor.
   //
   // TODO(creis): This may be an argument to build a pass_refptr<T> class, as
   // Darin suggests.
   static SiteInstance* Create(content::BrowserContext* browser_context);
@@ skipping 18 matching lines @@
  protected:
   friend class base::RefCounted<SiteInstance>;
 
   SiteInstance() {}
   virtual ~SiteInstance() {}
 };
 
 }  // namespace content.
 
 #endif  // CONTENT_PUBLIC_BROWSER_SITE_INSTANCE_H_