Don't reload into an app process.

content/browser/tab_contents/render_view_host_manager.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/tab_contents/render_view_host_manager.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
@@ skipping 369 matching lines @@
 
 SiteInstance* RenderViewHostManager::GetSiteInstanceForEntry(
     const NavigationEntry& entry,
     SiteInstance* curr_instance) {
   // NOTE: This is only called when ShouldTransitionCrossSite is true.
 
   const GURL& dest_url = entry.url();
   NavigationController& controller = delegate_->GetControllerForRenderManager();
   content::BrowserContext* browser_context = controller.browser_context();
 
-  // If the entry has an instance already we should use it, unless the URL
-  // is part of an app that has been installed or uninstalled since the last
-  // visit.
-  if (entry.site_instance()) {
-    if (entry.site_instance()->HasWrongProcessForURL(dest_url)) {
-      // If we need to swap to a different SiteInstance, the new one should have
-      // the same max_page_id as the current one so that it identifies new vs
-      // existing navigations correctly.  We also need to update the entry's
-      // SiteInstance, which we will do in TabContents::NavigateToEntry.
-      SiteInstance* new_instance =
-          curr_instance->GetRelatedSiteInstance(dest_url);
-      new_instance->UpdateMaxPageID(curr_instance->max_page_id());
-      return new_instance;
-    }
+  // If the entry has an instance already we should use it.
+  if (entry.site_instance())
     return entry.site_instance();
-  }
 
   // (UGLY) HEURISTIC, process-per-site only:
   //
   // If this navigation is generated, then it probably corresponds to a search
   // query.  Given that search results typically lead to users navigating to
   // other sites, we don't really want to use the search engine hostname to
   // determine the site instance for this navigation.
   //
   // NOTE: This can be removed once we have a way to transition between
   //       RenderViews in response to a link click.
@@ skipping 393 matching lines @@
   }
 }
 
 bool RenderViewHostManager::IsSwappedOut(RenderViewHost* rvh) {
   if (!rvh->site_instance())
     return false;
 
   return swapped_out_hosts_.find(rvh->site_instance()->id()) !=
       swapped_out_hosts_.end();
 }