Fix unit test style in Source/wtf/.

Source/wtf/StringExtrasTest.cpp

Index: Source/wtf/StringExtrasTest.cpp
diff --git a/Source/wtf/StringExtrasTest.cpp b/Source/wtf/StringExtrasTest.cpp
index 1b4929b0d7c38dc304f7ae588254bab3b06f582c..5c9e0b1bc05b28f28041f52bbf50d4322b636126 100644
--- a/Source/wtf/StringExtrasTest.cpp
+++ b/Source/wtf/StringExtrasTest.cpp
@@ -24,14 +24,14 @@
  */
 
 #include "config.h"
-
 #include "wtf/StringExtras.h"
+
 #include "wtf/text/CString.h"
 #include "wtf/text/WTFString.h"
 #include <gtest/gtest.h>
 #include <limits>
 
-namespace {
+namespace WTF {
 
 template<typename IntegerType> struct PrintfFormatTrait { static const char format[]; };
 
@@ -134,4 +134,4 @@ TEST(StringExtraTest, IntegerToStringConversionUnsignedIntegerRegularNumbers)
     testNumbers<unsigned long long>();
 }
 
-} // namespace
+} // namespace WTF