Web Animations: Set the DocumentTimeline's zero time when the Document reaches the 'loading' phase

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 1066 matching lines @@
     return String();
 }
 
 void Document::setReadyState(ReadyState readyState)
 {
     if (readyState == m_readyState)
         return;
 
     switch (readyState) {
     case Loading:
-        if (!m_documentTiming.domLoading)
+        if (!m_documentTiming.domLoading) {
             m_documentTiming.domLoading = monotonicallyIncreasingTime();
+            if (RuntimeEnabledFeatures::webAnimationsEnabled())
+                m_timeline->setZeroTimeAsPerfTime(m_documentTiming.domLoading);
+        }
         break;
     case Interactive:
-        if (!m_documentTiming.domInteractive) {
+        if (!m_documentTiming.domInteractive)
             m_documentTiming.domInteractive = monotonicallyIncreasingTime();
-            if (RuntimeEnabledFeatures::webAnimationsEnabled())
-                m_timeline->setZeroTimeAsPerfTime(m_documentTiming.domInteractive);
-        }
         break;
     case Complete:
         if (!m_documentTiming.domComplete)
             m_documentTiming.domComplete = monotonicallyIncreasingTime();
         break;
     }
 
     m_readyState = readyState;
     dispatchEvent(Event::create(eventNames().readystatechangeEvent, false, false));
 }
@@ skipping 4112 matching lines @@
 {
     return DocumentLifecycleNotifier::create(this);
 }
 
 DocumentLifecycleNotifier* Document::lifecycleNotifier()
 {
     return static_cast<DocumentLifecycleNotifier*>(ScriptExecutionContext::lifecycleNotifier());
 }
 
 } // namespace WebCore