Use process-per-app-instance for hosted apps without background permission.

content/browser/browsing_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/browsing_instance.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/browser/content_browser_client.h"
@@ skipping 19 matching lines @@
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   if (command_line.HasSwitch(switches::kProcessPerSite))
     return true;
 
   // We want to consolidate particular sites like extensions and WebUI whether
   // it is in process-per-tab or process-per-site-instance.
   // Note that --single-process may have been specified, but that affects the
   // process creation logic in RenderProcessHost, so we do not need to worry
   // about it here.
 
-  if (url.SchemeIs(chrome::kExtensionScheme))
+  if (content::GetContentClient()->browser()->ShouldUseProcessPerSite(profile_,
+                                                                      url))
     return true;
 
   // DevTools pages have WebUI type but should not reuse the same host.
   if (content::WebUIFactory::Get()->UseWebUIForURL(profile_, url) &&
       !url.SchemeIs(chrome::kChromeDevToolsScheme)) {
     return true;
   }
 
   // In all other cases, don't use process-per-site logic.
   return false;
@@ skipping 92 matching lines @@
     return true;
   }
   return false;
 }
 
 BrowsingInstance::~BrowsingInstance() {
   // We should only be deleted when all of the SiteInstances that refer to
   // us are gone.
   DCHECK(site_instance_map_.empty());
 }