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

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <utility>
@@ skipping 1229 matching lines @@
   }
 }
 
 void WebContentsImpl::WasUnOccluded() {
   for (RenderWidgetHostView* view : GetRenderWidgetHostViewsInTree()) {
     if (view)
       view->WasUnOccluded();
   }
 }
 
+void WebContentsImpl::MarkBackgrounded() {
+  WasHidden();
+}
+
 bool WebContentsImpl::NeedToFireBeforeUnload() {
   // TODO(creis): Should we fire even for interstitial pages?
   return WillNotifyDisconnection() && !ShowingInterstitialPage() &&
          !GetRenderViewHost()->SuddenTerminationAllowed();
 }
 
 void WebContentsImpl::DispatchBeforeUnload(bool for_cross_site_transition) {
   GetMainFrame()->DispatchBeforeUnload(for_cross_site_transition);
 }
 
@@ skipping 3561 matching lines @@
   else
     WasHidden();
 }
 
 void WebContentsImpl::SetJavaScriptDialogManagerForTesting(
     JavaScriptDialogManager* dialog_manager) {
   dialog_manager_ = dialog_manager;
 }
 
 }  // namespace content