Support window.opener after a process swap.

content/browser/site_instance.cc

 // Copyright (c) 2011 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 "content/browser/site_instance.h"
 
 #include "chrome/common/url_constants.h"
 #include "content/browser/browsing_instance.h"
 #include "content/browser/content_browser_client.h"
 #include "content/browser/renderer_host/browser_render_process_host.h"
 #include "content/browser/webui/web_ui_factory.h"
 #include "content/common/notification_service.h"
 #include "content/common/content_client.h"
 #include "net/base/registry_controlled_domain.h"
 
 // We treat javascript:, about:crash, about:hang, and about:shorthang as the
 // same site as any URL since they are actually modifiers on existing pages.
 static bool IsURLSameAsAnySiteInstance(const GURL& url) {
   if (!url.is_valid())
     return false;
   return url.SchemeIs(chrome::kJavaScriptScheme) ||
          url.spec() == chrome::kAboutCrashURL ||
          url.spec() == chrome::kAboutKillURL ||
          url.spec() == chrome::kAboutHangURL ||
          url.spec() == chrome::kAboutShorthangURL;
 }
 
+int32 SiteInstance::next_site_instance_id_ = 1;
+
 SiteInstance::SiteInstance(BrowsingInstance* browsing_instance)
-    : browsing_instance_(browsing_instance),
+    : id_(next_site_instance_id_++),
+      browsing_instance_(browsing_instance),
       render_process_host_factory_(NULL),
       process_(NULL),
       max_page_id_(-1),
       has_site_(false) {
   DCHECK(browsing_instance);
 
   registrar_.Add(this, NotificationType::RENDERER_PROCESS_TERMINATED,
                  NotificationService::AllSources());
 }
 
@@ skipping 177 matching lines @@
 }
 
 void SiteInstance::Observe(NotificationType type,
                            const NotificationSource& source,
                            const NotificationDetails& details) {
   DCHECK(type == NotificationType::RENDERER_PROCESS_TERMINATED);
   RenderProcessHost* rph = Source<RenderProcessHost>(source).ptr();
   if (rph == process_)
     process_ = NULL;
 }