Move existing kSitePerProcess checks to a policy-oracle object

content/browser/renderer_host/render_message_filter_browsertest.cc

 // Copyright 2015 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/basictypes.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "content/browser/frame_host/frame_tree.h"
@@ skipping 88 matching lines @@
   EXPECT_EQ("A=1; B=2; C=3; D=4",
             GetCookieFromJS(web_contents_https->GetMainFrame()));
   EXPECT_EQ("B=2; D=4", GetCookieFromJS(web_contents_http->GetMainFrame()));
 }
 
 // The RenderMessageFilter will kill processes when they access the cookies of
 // sites other than the site the process is dedicated to, under site isolation.
 IN_PROC_BROWSER_TEST_F(RenderMessageFilterBrowserTest,
                        CrossSiteCookieSecurityEnforcement) {
   // The code under test is only active under site isolation.
-  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kSitePerProcess)) {
+  if (!AreAllSitesIsolatedForTesting()) {
     return;
   }
 
   host_resolver()->AddRule("*", "127.0.0.1");
   ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
   SetupCrossSiteRedirector(embedded_test_server());
   NavigateToURL(shell(),
                 embedded_test_server()->GetURL("/frame_with_load_event.html"));
 
   WebContentsImpl* tab = static_cast<WebContentsImpl*>(shell()->web_contents());
@@ skipping 48 matching lines @@
 
   main_frame_killed.Wait();
 
   EXPECT_EQ(
       " Site A\n"
       "Where A = http://127.0.0.1/ (no process)",
       v.DepictFrameTree(tab->GetFrameTree()->root()));
 }
 
 }  // namespace content