Throttle rendering pipeline for invisible frames

third_party/WebKit/Source/core/frame/LocalFrame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 823 matching lines @@
 #endif
 
 String LocalFrame::localLayerTreeAsText(unsigned flags) const
 {
     if (!contentLayoutObject())
         return String();
 
     return contentLayoutObject()->compositor()->layerTreeAsText(static_cast<LayerTreeFlags>(flags));
 }
 
+bool LocalFrame::shouldThrottleRendering() const
+{
+    return view() && view()->shouldThrottleRendering();
+}
+
 inline LocalFrame::LocalFrame(FrameLoaderClient* client, FrameHost* host, FrameOwner* owner)
     : Frame(client, host, owner)
     , m_loader(this)
     , m_navigationScheduler(NavigationScheduler::create(this))
     , m_script(ScriptController::create(this))
     , m_editor(Editor::create(*this))
     , m_spellChecker(SpellChecker::create(*this))
     , m_selection(FrameSelection::create(this))
     , m_eventHandler(adoptPtrWillBeNoop(new EventHandler(this)))
     , m_console(FrameConsole::create(*this))
@@ skipping 23 matching lines @@
     if (!context)
         return;
 
     WebSecurityOrigin securityOrigin(context->securityOrigin());
     frameScheduler()->setFrameOrigin(&securityOrigin);
 }
 
 DEFINE_WEAK_IDENTIFIER_MAP(LocalFrame);
 
 } // namespace blink