Remove Dangerous indicator after going back from interstitial

chrome/browser/safe_browsing/safe_browsing_blocking_page_unittest.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.
 
 #include <list>
 
 #include "base/run_loop.h"
 #include "chrome/browser/interstitials/chrome_controller_client.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/safe_browsing/safe_browsing_blocking_page.h"
@@ skipping 74 matching lines @@
   SafeBrowsingBlockingPageTest() {
     ResetUserResponse();
     // The safe browsing UI manager does not need a service for this test.
     ui_manager_ = new TestSafeBrowsingUIManager(NULL);
   }
 
   void SetUp() override {
     ChromeRenderViewHostTestHarness::SetUp();
     SafeBrowsingBlockingPage::RegisterFactory(&factory_);
     ResetUserResponse();
+    SafeBrowsingUIManager::CreateWhitelistForTesting(web_contents());
   }
 
   void TearDown() override {
     // Release the UI manager before the BrowserThreads are destroyed.
     ui_manager_ = NULL;
     SafeBrowsingBlockingPage::RegisterFactory(NULL);
     // Clean up singleton reference (crbug.com/110594).
     ThreatDetails::RegisterFactory(NULL);
     ChromeRenderViewHostTestHarness::TearDown();
   }
@@ skipping 729 matching lines @@
 
   // No report should have been sent.
   EXPECT_EQ(0u, ui_manager_->GetThreatDetails()->size());
   ui_manager_->GetThreatDetails()->clear();
 }
 
 // TODO(mattm): Add test for extended reporting not shown or sent in incognito
 // window.
 
 }  // namespace safe_browsing