Move existing kSitePerProcess checks to a policy-oracle object

chrome/browser/password_manager/password_manager_browsertest.cc

 // Copyright 2013 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 <string>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram_samples.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/path_service.h"
@@ skipping 1952 matching lines @@
   CheckElementValue("iframe", "username_field", "temp");
 
 }
 
 // The password manager driver will kill processes when they try to access
 // passwords of sites other than the site the process is dedicated to, under
 // site isolation.
 IN_PROC_BROWSER_TEST_F(PasswordManagerBrowserTestBase,
                        CrossSitePasswordEnforcement) {
   // The code under test is only active under site isolation.
-  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
-          ::switches::kSitePerProcess)) {
+  if (!content::AreAllSitesIsolatedForTesting()) {
     return;
   }
 
   // Setup the mock host resolver
   host_resolver()->AddRule("*", "127.0.0.1");
 
   // Navigate the main frame.
   GURL main_frame_url = embedded_test_server()->GetURL(
       "/password/password_form_in_crosssite_iframe.html");
   NavigationObserver observer(WebContents());
@@ skipping 31 matching lines @@
       content::RenderProcessHostWatcher::WATCH_FOR_PROCESS_EXIT);
 
   IPC::IpcSecurityTestUtil::PwnMessageReceived(
       iframe->GetProcess()->GetChannel(), illegal_forms_parsed);
 
   iframe_killed.Wait();
 }
 
 }  // namespace password_manager