Refactor BaseBlockingPage to reduce duplicated code

chrome/browser/safe_browsing/safe_browsing_blocking_page_test.cc

 // Copyright (c) 2012 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.
 //
 // This test creates a fake safebrowsing service, where we can inject known-
 // threat urls.  It then uses a real browser to go to these urls, and sends
 // "goback" or "proceed" commands and verifies they work.
 
 #include <algorithm>
 
@@ skipping 224 matching lines @@
       const GURL& main_frame_url,
       const UnsafeResourceList& unsafe_resources,
       const SafeBrowsingErrorUI::SBErrorDisplayOptions& display_options)
       : SafeBrowsingBlockingPage(manager,
                                  web_contents,
                                  main_frame_url,
                                  unsafe_resources,
                                  display_options),
         wait_for_delete_(false) {
     // Don't wait the whole 3 seconds for the browser test.
-    threat_details_proceed_delay_ms_ = 100;
+    SetThreatDetailsProceedDelayForTesting(100);
   }
 
   ~TestSafeBrowsingBlockingPage() override {
     if (!wait_for_delete_)
       return;
 
     // Notify that we are gone
     base::MessageLoopForUI::current()->QuitWhenIdle();
     wait_for_delete_ = false;
   }
@@ skipping 1123 matching lines @@
 
 INSTANTIATE_TEST_CASE_P(
     SafeBrowsingBlockingPageIDNTestWithThreatType,
     SafeBrowsingBlockingPageIDNTest,
     testing::Combine(testing::Values(false, true),
                      testing::Values(SB_THREAT_TYPE_URL_MALWARE,
                                      SB_THREAT_TYPE_URL_PHISHING,
                                      SB_THREAT_TYPE_URL_UNWANTED)));
 
 }  // namespace safe_browsing