Removing "using" declarations that import names in the C++ Standard library.(Source/platform/audio)

Source/platform/audio/Distance.cpp

 /*
  * Copyright (C) 2010 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
@@ skipping 18 matching lines @@
 #include "config.h"
 
 #if ENABLE(WEB_AUDIO)
 
 #include "platform/audio/Distance.h"
 #include "wtf/Assertions.h"
 
 #include <math.h>
 #include <algorithm>
 
-using namespace std;
-
 namespace blink {
 
 DistanceEffect::DistanceEffect()
     : m_model(ModelInverse)
     , m_isClamped(true)
     , m_refDistance(1.0)
     , m_maxDistance(10000.0)
     , m_rolloffFactor(1.0)
 {
 }
 
 double DistanceEffect::gain(double distance)
 {
     // don't go beyond maximum distance
-    distance = min(distance, m_maxDistance);
+    distance = std::min(distance, m_maxDistance);
 
     // if clamped, don't get closer than reference distance
     if (m_isClamped)
-        distance = max(distance, m_refDistance);
+        distance = std::max(distance, m_refDistance);
 
     switch (m_model) {
     case ModelLinear:
         return linearGain(distance);
     case ModelInverse:
         return inverseGain(distance);
     case ModelExponential:
         return exponentialGain(distance);
     }
     ASSERT_NOT_REACHED();
@@ skipping 13 matching lines @@
 }
 
 double DistanceEffect::exponentialGain(double distance)
 {
     return pow(distance / m_refDistance, -m_rolloffFactor);
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)