Removing "using" declarations that import names in the C++ Standard library.(Source/platform/[m* - …

Source/platform/transforms/RotateTransformOperation.cpp

Index: Source/platform/transforms/RotateTransformOperation.cpp
diff --git a/Source/platform/transforms/RotateTransformOperation.cpp b/Source/platform/transforms/RotateTransformOperation.cpp
index e64cd7d1e0846a0244d9453d5837ae585b115951..8a49884e2d5f333b16a52857229654b5f88df90e 100644
--- a/Source/platform/transforms/RotateTransformOperation.cpp
+++ b/Source/platform/transforms/RotateTransformOperation.cpp
@@ -27,8 +27,6 @@
 #include "wtf/MathExtras.h"
 #include <algorithm>
 
-using namespace std;
-
 namespace blink {
 
 static const double angleEpsilon = 1e-4;
@@ -135,14 +133,14 @@ PassRefPtr<TransformOperation> RotateTransformOperation::blend(const TransformOp
     double x = -decomp.quaternionX;
     double y = -decomp.quaternionY;
     double z = -decomp.quaternionZ;
-    double length = sqrt(x * x + y * y + z * z);
+    double length = std::sqrt(x * x + y * y + z * z);
     double angle = 0;
 
     if (length > 0.00001) {
         x /= length;
         y /= length;
         z /= length;
-        angle = rad2deg(acos(decomp.quaternionW) * 2);
+        angle = rad2deg(std::acos(decomp.quaternionW) * 2);
     } else {
         x = 0;
         y = 0;