Removing unnecessary "using" statements.

third_party/WebKit/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 21 matching lines @@
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/probe/CoreProbes.h"
 #include "platform/loader/fetch/Resource.h"
 #include "platform/loader/fetch/ResourceFetcher.h"
 #include "platform/loader/fetch/ResourceResponse.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/text/CString.h"
 
-using namespace std;
-
 namespace blink {
 
 // Always start progress at initialProgressValue. This helps provide feedback as
 // soon as a load starts.
 static const double initialProgressValue = 0.1;
 
 static const int progressItemDefaultEstimatedLength = 1024 * 1024;
 
 static const double progressNotificationInterval = 0.02;
 static const double progressNotificationTimeInterval = 0.1;
@@ skipping 180 matching lines @@
 void ProgressTracker::completeProgress(unsigned long identifier) {
   ProgressItem* item = m_progressItems.at(identifier);
   if (!item)
     return;
 
   item->estimatedLength = item->bytesReceived;
   maybeSendProgress();
 }
 
 }  // namespace blink