Move existing kSitePerProcess checks to a policy-oracle object

content/browser/frame_host/frame_tree_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 "content/browser/frame_host/frame_tree.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
-#include "content/public/common/content_switches.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/public/test/test_navigation_observer.h"
 #include "content/public/test/test_utils.h"
 #include "content/shell/browser/shell.h"
 #include "content/test/content_browser_test_utils_internal.h"
 #include "net/dns/mock_host_resolver.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
@@ skipping 289 matching lines @@
   // Close the original window.  This should clear the new window's opener.
   shell()->Close();
   EXPECT_EQ(nullptr, popup_root->opener());
 }
 
 class CrossProcessFrameTreeBrowserTest : public ContentBrowserTest {
  public:
   CrossProcessFrameTreeBrowserTest() {}
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
-    command_line->AppendSwitch(switches::kSitePerProcess);
+    IsolateAllSitesForTesting(command_line);
   }
 
   void SetUpOnMainThread() override {
     host_resolver()->AddRule("*", "127.0.0.1");
     ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
     SetupCrossSiteRedirector(embedded_test_server());
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CrossProcessFrameTreeBrowserTest);
@@ skipping 93 matching lines @@
   GURL data_url("data:text/html,foo");
   NavigateFrameToURL(root->child_at(1), data_url);
 
   // Navigating to a data URL should set a unique origin.  This is represented
   // as "null" per RFC 6454.
   EXPECT_EQ(root->child_at(1)->current_replication_state().origin.Serialize(),
             "null");
 }
 
 }  // namespace content