Revert of Removing "using" declarations that import names in the C++ Standard library.

Source/core/svg/animation/SMILTimeContainer.cpp

Index: Source/core/svg/animation/SMILTimeContainer.cpp
diff --git a/Source/core/svg/animation/SMILTimeContainer.cpp b/Source/core/svg/animation/SMILTimeContainer.cpp
index be1fb7e3e23341655a5e746537407e88d7503346..8f3f12ec7bc0c8991fae839b9a38a903bad451ce 100644
--- a/Source/core/svg/animation/SMILTimeContainer.cpp
+++ b/Source/core/svg/animation/SMILTimeContainer.cpp
@@ -33,6 +33,8 @@
 #include "core/svg/SVGSVGElement.h"
 #include "core/svg/animation/SVGSMILElement.h"
 
+using namespace std;
+
 namespace WebCore {
 
 static const double initialFrameDelay = 0.025;
@@ -421,7 +423,7 @@
 
             SMILTime nextFireTime = animation->nextProgressTime();
             if (nextFireTime.isFinite())
-                earliestFireTime = std::min(nextFireTime, earliestFireTime);
+                earliestFireTime = min(nextFireTime, earliestFireTime);
         }
 
         if (resultElement)