Make DocumentLoader::timing return a reference

Source/core/dom/ScriptedAnimationController.cpp

 /*
  * Copyright (C) 2011 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 142 matching lines @@
         InspectorInstrumentation::didRemoveEvent(eventTarget, events[i].get());
     }
 }
 
 void ScriptedAnimationController::executeCallbacks(double monotonicTimeNow)
 {
     // dispatchEvents() runs script which can cause the document to be destroyed.
     if (!m_document)
         return;
 
-    double highResNowMs = 1000.0 * m_document->loader()->timing()->monotonicTimeToZeroBasedDocumentTime(monotonicTimeNow);
-    double legacyHighResNowMs = 1000.0 * m_document->loader()->timing()->monotonicTimeToPseudoWallTime(monotonicTimeNow);
+    double highResNowMs = 1000.0 * m_document->loader()->timing().monotonicTimeToZeroBasedDocumentTime(monotonicTimeNow);
+    double legacyHighResNowMs = 1000.0 * m_document->loader()->timing().monotonicTimeToPseudoWallTime(monotonicTimeNow);
 
     // First, generate a list of callbacks to consider.  Callbacks registered from this point
     // on are considered only for the "next" frame, not this one.
     ASSERT(m_callbacksToInvoke.isEmpty());
     m_callbacksToInvoke.swap(m_callbacks);
 
     for (size_t i = 0; i < m_callbacksToInvoke.size(); ++i) {
         RequestAnimationFrameCallback* callback = m_callbacksToInvoke[i].get();
         if (!callback->m_cancelled) {
             TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "FireAnimationFrame", "data", InspectorAnimationFrameEvent::data(m_document, callback->m_id));
@@ skipping 68 matching lines @@
         return;
 
     if (!m_callbacks.size() && !m_eventQueue.size() && !m_mediaQueryListListeners.size())
         return;
 
     if (FrameView* frameView = m_document->view())
         frameView->scheduleAnimation();
 }
 
 }