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

Source/core/html/forms/InputType.cpp

Index: Source/core/html/forms/InputType.cpp
diff --git a/Source/core/html/forms/InputType.cpp b/Source/core/html/forms/InputType.cpp
index db885837fc099048640d9ff8b51043ff670299e5..b2d9d4f354600073b4cb1a60beeb20df7ff9f5a8 100644
--- a/Source/core/html/forms/InputType.cpp
+++ b/Source/core/html/forms/InputType.cpp
@@ -73,7 +73,6 @@ namespace WebCore {
 
 using blink::WebLocalizedString;
 using namespace HTMLNames;
-using namespace std;
 
 typedef PassRefPtrWillBeRawPtr<InputType> (*InputTypeFactoryFunction)(HTMLInputElement&);
 typedef HashMap<AtomicString, InputTypeFactoryFunction, CaseFoldingHash> InputTypeFactoryMap;
@@ -200,7 +199,7 @@ void InputType::setValueAsDate(double, ExceptionState& exceptionState) const
 
 double InputType::valueAsDouble() const
 {
-    return numeric_limits<double>::quiet_NaN();
+    return std::numeric_limits<double>::quiet_NaN();
 }
 
 void InputType::setValueAsDouble(double doubleValue, TextFieldEventBehavior eventBehavior, ExceptionState& exceptionState) const