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

Source/platform/text/LocaleICUTest.cpp

Index: Source/platform/text/LocaleICUTest.cpp
diff --git a/Source/platform/text/LocaleICUTest.cpp b/Source/platform/text/LocaleICUTest.cpp
index 16b09bf812f0de7d8fb93d6c31e8c131dbb4f647..d20063ffb92732ad842b55698e2f82e066ae4cda 100644
--- a/Source/platform/text/LocaleICUTest.cpp
+++ b/Source/platform/text/LocaleICUTest.cpp
@@ -36,7 +36,7 @@
 #include <gtest/gtest.h>
 #include <unicode/uvernum.h>
 
-using namespace blink;
+namespace blink {
 
 class LocaleICUTest : public ::testing::Test {
 public:
@@ -295,3 +295,5 @@ TEST_F(LocaleICUTest, reversible)
     testNumbers("zh_HK");
     testNumbers("zh_TW");
 }
+
+} // namespace blink