Implement a basic Site Engagement Score service.

chrome/browser/ui/tab_helpers.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 "chrome/browser/ui/tab_helpers.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/content_settings/chrome_content_settings_client.h"
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
+#include "chrome/browser/engagement/site_engagement_helper.h"
+#include "chrome/browser/engagement/site_engagement_service.h"
 #include "chrome/browser/favicon/favicon_helper.h"
 #include "chrome/browser/history/history_tab_helper.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/net/net_error_tab_helper.h"
 #include "chrome/browser/net/predictor_tab_helper.h"
 #include "chrome/browser/password_manager/chrome_password_manager_client.h"
 #include "chrome/browser/predictors/resource_prefetch_predictor_factory.h"
 #include "chrome/browser/predictors/resource_prefetch_predictor_tab_helper.h"
 #include "chrome/browser/prerender/prerender_tab_helper.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
@@ skipping 124 matching lines @@
   FindTabHelper::CreateForWebContents(web_contents);
   HistoryTabHelper::CreateForWebContents(web_contents);
   InfoBarService::CreateForWebContents(web_contents);
   ManagePasswordsUIController::CreateForWebContents(web_contents);
   NavigationCorrectionTabObserver::CreateForWebContents(web_contents);
   NavigationMetricsRecorder::CreateForWebContents(web_contents);
   PopupBlockerTabHelper::CreateForWebContents(web_contents);
   PrefsTabHelper::CreateForWebContents(web_contents);
   prerender::PrerenderTabHelper::CreateForWebContents(web_contents);
   SearchTabHelper::CreateForWebContents(web_contents);
+  if (SiteEngagementService::IsEnabled())
+    SiteEngagementHelper::CreateForWebContents(web_contents);
   // TODO(vabr): Remove TabSpecificContentSettings from here once their function
   // is taken over by ChromeContentSettingsClient. http://crbug.com/387075
   TabSpecificContentSettings::CreateForWebContents(web_contents);
 
   // --- Platform-specific tab helpers ---
 
 #if defined(OS_ANDROID)
   ContextMenuHelper::CreateForWebContents(web_contents);
   EnhancedBookmarkTabHelper::CreateForWebContents(web_contents);
   SingleTabModeTabHelper::CreateForWebContents(web_contents);
@@ skipping 52 matching lines @@
     dom_distiller::WebContentsMainFrameObserver::CreateForWebContents(
         web_contents);
   }
 
   if (predictors::ResourcePrefetchPredictorFactory::GetForProfile(
       web_contents->GetBrowserContext())) {
     predictors::ResourcePrefetchPredictorTabHelper::CreateForWebContents(
         web_contents);
   }
 }