Fix unit test style in Source/wtf/.

Source/wtf/TemporaryChangeTest.cpp

Index: Source/wtf/TemporaryChangeTest.cpp
diff --git a/Source/wtf/TemporaryChangeTest.cpp b/Source/wtf/TemporaryChangeTest.cpp
index 36ab481a6a08cb61b378ffce74e9963c4a862de1..b1191ce17abe72d2eaff0f1266681c9d7e4fedec 100644
--- a/Source/wtf/TemporaryChangeTest.cpp
+++ b/Source/wtf/TemporaryChangeTest.cpp
@@ -24,11 +24,11 @@
  */
 
 #include "config.h"
-
 #include "wtf/TemporaryChange.h"
+
 #include <gtest/gtest.h>
 
-namespace {
+namespace WTF {
 
 TEST(TemporaryChangeTest, Nested)
 {
@@ -45,4 +45,4 @@ TEST(TemporaryChangeTest, Nested)
     EXPECT_FALSE(originallyFalse);
 }
 
-} // namespace
+} // namespace WTF