Move existing kSitePerProcess checks to a policy-oracle object

chrome/browser/chrome_site_per_process_browsertest.cc

 // Copyright 2014 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 "base/command_line.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_observer.h"
-#include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/public/test/test_utils.h"
 #include "net/dns/mock_host_resolver.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "url/gurl.h"
 
 class ChromeSitePerProcessTest : public InProcessBrowserTest {
  public:
   ChromeSitePerProcessTest() {}
   ~ChromeSitePerProcessTest() override {}
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
-    command_line->AppendSwitch(switches::kSitePerProcess);
+    content::IsolateAllSitesForTesting(command_line);
   }
 
   void SetUpOnMainThread() override {
     host_resolver()->AddRule("*", "127.0.0.1");
     ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
     content::SetupCrossSiteRedirector(embedded_test_server());
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ChromeSitePerProcessTest);
@@ skipping 52 matching lines @@
   EXPECT_TRUE(ExecuteScriptAndExtractBool(
       frame_host,
       "window.domAutomationController.send(!!openDatabase("
       "'foodb', '1.0', 'Test DB', 1024));",
       &is_object_created));
   EXPECT_TRUE(is_object_created);
   EXPECT_TRUE(ExecuteScript(frame_host,
                             "window.webkitRequestFileSystem("
                             "window.TEMPORARY, 1024, function() {});"));
 }