Remove FillDOMInThreatDetails finch feature.

chrome/browser/safe_browsing/threat_details.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_THREAT_DETAILS_H_
 #define CHROME_BROWSER_SAFE_BROWSING_THREAT_DETAILS_H_
 
 // A class that encapsulates the detailed threat reports sent when
 // users opt-in to do so from the safe browsing warning page.
 
 // An instance of this class is generated when a safe browsing warning page
 // is shown (SafeBrowsingBlockingPage).
 
 #include <memory>
 #include <string>
 #include <unordered_set>
 #include <vector>
 
 #include "base/containers/hash_tables.h"
-#include "base/feature_list.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/safe_browsing/ui_manager.h"
 #include "chrome/common/safe_browsing/csd.pb.h"
 #include "components/safe_browsing/common/safebrowsing_types.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "net/base/completion_callback.h"
 
 namespace net {
 class URLRequestContextGetter;
 }
 
 class Profile;
 struct SafeBrowsingHostMsg_ThreatDOMDetails_Node;
 
 namespace safe_browsing {
 
-extern const base::Feature kFillDOMInThreatDetails;
-
 // Maps a URL to its Resource.
 class ThreatDetailsCacheCollector;
 class ThreatDetailsRedirectsCollector;
 class ThreatDetailsFactory;
 
 using ResourceMap =
     base::hash_map<std::string,
                    std::unique_ptr<ClientSafeBrowsingReportRequest::Resource>>;
 
 // Maps a key of an HTML element to its corresponding HTMLElement proto message.
@@ skipping 194 matching lines @@
 
   virtual ThreatDetails* CreateThreatDetails(
       BaseUIManager* ui_manager,
       content::WebContents* web_contents,
       const SafeBrowsingUIManager::UnsafeResource& unsafe_resource) = 0;
 };
 
 }  // namespace safe_browsing
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_THREAT_DETAILS_H_