Add a way to send the resource percentage signal to the RC.

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 <memory>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 183 matching lines @@
                         Profile::FromBrowserContext(
                             web_contents->GetBrowserContext())).get());
   HistoryTabHelper::CreateForWebContents(web_contents);
   InfoBarService::CreateForWebContents(web_contents);
   metrics::RendererUptimeWebContentsObserver::CreateForWebContents(
       web_contents);
   if (content::IsBrowserSideNavigationEnabled())
     MixedContentSettingsTabHelper::CreateForWebContents(web_contents);
   NavigationCorrectionTabObserver::CreateForWebContents(web_contents);
   NavigationMetricsRecorder::CreateForWebContents(web_contents);
-  chrome::InitializePageLoadMetricsForWebContents(web_contents);
+  chrome::InitializePageLoadMetricsForWebContents(web_contents,
+                                                  false /* not background */);
   PermissionRequestManager::CreateForWebContents(web_contents);
   PopupBlockerTabHelper::CreateForWebContents(web_contents);
   PrefsTabHelper::CreateForWebContents(web_contents);
   prerender::PrerenderTabHelper::CreateForWebContents(web_contents);
   PreviewsInfoBarTabHelper::CreateForWebContents(web_contents);
   SearchTabHelper::CreateForWebContents(web_contents);
   SearchEngineTabHelper::CreateForWebContents(web_contents);
   SecurityStateTabHelper::CreateForWebContents(web_contents);
   if (SiteEngagementService::IsEnabled())
     SiteEngagementService::Helper::CreateForWebContents(web_contents);
@@ skipping 92 matching lines @@
     predictors::ResourcePrefetchPredictorTabHelper::CreateForWebContents(
         web_contents);
   }
 
   if (tracing::NavigationTracingObserver::IsEnabled())
     tracing::NavigationTracingObserver::CreateForWebContents(web_contents);
 
   if (MediaEngagementService::IsEnabled())
     MediaEngagementService::CreateWebContentsObserver(web_contents);
 }