Revert of Remove the 10 second delay before user input generates engagement.

chrome/browser/engagement/site_engagement_helper.h

 // Copyright 2015 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_ENGAGEMENT_SITE_ENGAGEMENT_HELPER_H_
 #define CHROME_BROWSER_ENGAGEMENT_SITE_ENGAGEMENT_HELPER_H_
 
 #include "base/macros.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/engagement/site_engagement_metrics.h"
@@ skipping 12 matching lines @@
 class Origin;
 }
 
 // Per-WebContents class to handle updating the site engagement scores for
 // origins.
 class SiteEngagementService::Helper
     : public content::WebContentsObserver,
       public content::WebContentsUserData<SiteEngagementService::Helper> {
  public:
   static void SetSecondsBetweenUserInputCheck(int seconds);
+  static void SetSecondsTrackingDelayAfterNavigation(int seconds);
   static void SetSecondsTrackingDelayAfterShow(int seconds);
 
   ~Helper() override;
 
   void OnEngagementLevelChanged(const GURL& url,
                                 blink::mojom::EngagementLevel level);
 
  private:
   // Class to encapsulate the periodic detection of site engagement.
   //
@@ skipping 140 matching lines @@
   void WasHidden() override;
 
   InputTracker input_tracker_;
   MediaTracker media_tracker_;
   SiteEngagementService* service_;
 
   DISALLOW_COPY_AND_ASSIGN(Helper);
 };
 
 #endif  // CHROME_BROWSER_ENGAGEMENT_SITE_ENGAGEMENT_HELPER_H_