Fix unit test style in Source/platform/, part 2.

Source/platform/text/LocaleWinTest.cpp

Index: Source/platform/text/LocaleWinTest.cpp
diff --git a/Source/platform/text/LocaleWinTest.cpp b/Source/platform/text/LocaleWinTest.cpp
index f9ebb2a53307695b266fca187f5e66d13c347185..6c83fded36a125aef2088cafa55ebf925baf0045 100644
--- a/Source/platform/text/LocaleWinTest.cpp
+++ b/Source/platform/text/LocaleWinTest.cpp
@@ -38,8 +38,7 @@
 #include "wtf/text/CString.h"
 #include <gtest/gtest.h>
 
-using namespace blink;
-using namespace std;
+namespace blink {
 
 class LocaleWinTest : public ::testing::Test {
 protected:
@@ -303,3 +302,5 @@ TEST_F(LocaleWinTest, localizedNumberRoundTrip)
     testNumbers(ChineseHK);
     testNumbers(ChineseTW);
 }
+
+} // namespace blink