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

Source/platform/audio/HRTFPanner.cpp

Index: Source/platform/audio/HRTFPanner.cpp
diff --git a/Source/platform/audio/HRTFPanner.cpp b/Source/platform/audio/HRTFPanner.cpp
index 04e410dba233decde70c91472d12cf7ba6103ab3..cfef47af91e00ce6f4e0fad5e23a41c1906aeaaf 100644
--- a/Source/platform/audio/HRTFPanner.cpp
+++ b/Source/platform/audio/HRTFPanner.cpp
@@ -34,8 +34,6 @@
 #include "wtf/MathExtras.h"
 #include "wtf/RefPtr.h"
 
-using namespace std;
-
 namespace blink {
 
 // The value of 2 milliseconds is larger than the largest delay which exists in any HRTFKernel from the default HRTFDatabase (0.0136 seconds).
@@ -113,8 +111,8 @@ int HRTFPanner::calculateDesiredAzimuthIndexAndBlend(double azimuth, double& azi
 
     // We don't immediately start using this azimuth index, but instead approach this index from the last index we rendered at.
     // This minimizes the clicks and graininess for moving sources which occur otherwise.
-    desiredAzimuthIndex = max(0, desiredAzimuthIndex);
-    desiredAzimuthIndex = min(numberOfAzimuths - 1, desiredAzimuthIndex);
+    desiredAzimuthIndex = std::max(0, desiredAzimuthIndex);
+    desiredAzimuthIndex = std::min(numberOfAzimuths - 1, desiredAzimuthIndex);
     return desiredAzimuthIndex;
 }