Simply FrameLoaderStateMachine and FrameLoader::transitionToCommitted().

Source/core/loader/ProgressTracker.cpp

 /*
  * Copyright (C) 2007 Apple 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 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
 #include "config.h"
 #include "core/loader/ProgressTracker.h"
 
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
-#include "core/loader/FrameLoaderStateMachine.h"
 #include "core/page/Frame.h"
+#include "core/page/FrameView.h"
 #include "core/platform/Logging.h"
 #include "core/platform/network/ResourceResponse.h"
 #include <wtf/CurrentTime.h>
 #include <wtf/text/CString.h>
 
 using std::min;
 
 namespace WebCore {
 
 // Always start progress at initialProgressValue. This helps provide feedback as 
@@ skipping 144 matching lines @@
     
     int numPendingOrLoadingRequests = frame->loader()->numPendingOrLoadingRequests(true);
     estimatedBytesForPendingRequests = progressItemDefaultEstimatedLength * numPendingOrLoadingRequests;
     remainingBytes = ((m_totalPageAndResourceBytesToLoad + estimatedBytesForPendingRequests) - m_totalBytesReceived);
     if (remainingBytes > 0)  // Prevent divide by 0.
         percentOfRemainingBytes = (double)bytesReceived / (double)remainingBytes;
     else
         percentOfRemainingBytes = 1.0;
     
     // For documents that use WebCore's layout system, treat first layout as the half-way point.
-    bool useClampedMaxProgress = !frame->loader()->stateMachine()->firstLayoutDone();
+    bool useClampedMaxProgress = !frame->view()->didFirstLayout();
     double maxProgressValue = useClampedMaxProgress ? 0.5 : finalProgressValue;
     increment = (maxProgressValue - m_progressValue) * percentOfRemainingBytes;
     m_progressValue += increment;
     m_progressValue = min(m_progressValue, maxProgressValue);
     ASSERT(m_progressValue >= initialProgressValue);
     
     m_totalBytesReceived += bytesReceived;
     
     double now = currentTime();
     double notifiedProgressTimeDelta = now - m_lastNotifiedProgressTime;
@@ skipping 24 matching lines @@
         return;
     
     // Adjust the total expected bytes to account for any overage/underage.
     long long delta = item->bytesReceived - item->estimatedLength;
     m_totalPageAndResourceBytesToLoad += delta;
 
     m_progressItems.remove(identifier);
 }
 
 }