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

Source/platform/text/DateTimeFormatTest.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 13 matching lines @@
  */
 
 #include "config.h"
 #include "platform/text/DateTimeFormat.h"
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
 #include "wtf/text/CString.h"
 #include "wtf/text/StringBuilder.h"
 #include <gtest/gtest.h>
 
-using namespace blink;
+namespace blink {
 
 class DateTimeFormatTest : public ::testing::Test {
 public:
-    typedef DateTimeFormat::FieldType FieldType;
+    using FieldType = DateTimeFormat::FieldType;
 
     struct Token {
         String string;
         int count;
         FieldType fieldType;
 
         Token(FieldType fieldType, int count = 1)
             : count(count)
             , fieldType(fieldType)
         {
@@ skipping 127 matching lines @@
         formatString[1] = 0;
         TokenHandler handler;
         if (!DateTimeFormat::parse(formatString, handler))
             return DateTimeFormat::FieldTypeInvalid;
         return handler.fieldType(0);
     }
 
 private:
     class TokenHandler : public DateTimeFormat::TokenHandler {
     public:
-        virtual ~TokenHandler() { }
+        ~TokenHandler() override { }
 
         FieldType fieldType(int index) const
         {
             return index >=0 && index < static_cast<int>(m_tokens.size()) ? m_tokens[index].fieldType : DateTimeFormat::FieldTypeInvalid;
         }
 
         Tokens tokens() const { return Tokens(m_tokens); }
 
     private:
-        virtual void visitField(FieldType fieldType, int count) override
+        void visitField(FieldType fieldType, int count) override
         {
             m_tokens.append(Token(fieldType, count));
         }
 
         virtual void visitLiteral(const String& string) override
         {
             m_tokens.append(Token(string));
         }
 
         Vector<Token> m_tokens;
@@ skipping 120 matching lines @@
     EXPECT_EQ(DateTimeFormat::FieldTypeInvalid, single('N'));
     EXPECT_EQ(DateTimeFormat::FieldTypeInvalid, single('O'));
     EXPECT_EQ(DateTimeFormat::FieldTypeInvalid, single('P'));
     EXPECT_EQ(DateTimeFormat::FieldTypeInvalid, single('R'));
     EXPECT_EQ(DateTimeFormat::FieldTypeInvalid, single('T'));
     EXPECT_EQ(DateTimeFormat::FieldTypeInvalid, single('U'));
     EXPECT_EQ(DateTimeFormat::FieldTypeInvalid, single('V'));
     EXPECT_EQ(DateTimeFormat::FieldTypeInvalid, single('X'));
 }
 
+} // namespace blink
+
 #endif