Move throttling of background timers into the renderer scheduler

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 2855 matching lines @@
 const KURL& Document::virtualURL() const
 {
     return m_url;
 }
 
 KURL Document::virtualCompleteURL(const String& url) const
 {
     return completeURL(url);
 }
 
-double Document::timerAlignmentInterval() const
-{
-    Page* p = page();
-    if (!p)
-        return DOMTimer::visiblePageAlignmentInterval();
-    return p->timerAlignmentInterval();
-}
-
 DOMTimerCoordinator* Document::timers()
 {
     return &m_timers;
 }
 
 EventTarget* Document::errorEventTarget()
 {
     return domWindow();
 }
 
@@ skipping 2938 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     Document::WeakDocumentSet& set = Document::liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif