Remove WebContents::Was{Hidden,Shown}() from the content public interface

chrome/browser/sessions/tab_loader.cc

 // 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.
 
 #include "chrome/browser/sessions/tab_loader.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/memory/memory_pressure_monitor.h"
@@ skipping 165 matching lines @@
       Browser* browser = chrome::FindBrowserWithWebContents(contents);
       if (browser &&
           browser->tab_strip_model()->GetActiveWebContents() != contents) {
         // By default tabs are marked as visible. As only the active tab is
         // visible we need to explicitly tell non-active tabs they are hidden.
         // Without this call non-active tabs are not marked as backgrounded.
         //
         // NOTE: We need to do this here rather than when the tab is added to
         // the Browser as at that time not everything has been created, so that
         // the call would do nothing.
-        contents->WasHidden();
+        //
+        // TODO(tapted): See whether |initially_hidden| can instead be used when
+        // creating the WebContents.
+        contents->MarkBackgrounded();
       }
     }
   }
 
   if (!tabs_to_load_.empty())
     StartTimer();
 }
 
 void TabLoader::StartFirstTimer() {
   force_load_timer_.Stop();
@@ skipping 70 matching lines @@
     // memory pressure.
     stats_collector_->DeferTab(tab);
   }
   // By calling |LoadNextTab| explicitly, we make sure that the
   // |NOTIFICATION_SESSION_RESTORE_DONE| event gets sent.
   LoadNextTab();
 }
 
 // static
 TabLoader* TabLoader::shared_tab_loader_ = nullptr;