Fix unit test style in Source/platform/, part 1.

Source/platform/TracedValueTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
-
 #include "platform/TracedValue.h"
 
 #include <gtest/gtest.h>
 
-using namespace blink;
-
-namespace {
+namespace blink {
 
 TEST(TracedValueTest, FlatDictionary)
 {
     RefPtr<TracedValue> value = TracedValue::create();
     value->setInteger("int", 2014);
     value->setDouble("double", 0.0);
     value->setBoolean("bool", true);
     value->setString("string", "string");
     String json = value->asTraceFormat();
     EXPECT_EQ("{\"int\":2014,\"double\":0,\"bool\":true,\"string\":\"string\"}", json);
@@ skipping 17 matching lines @@
     value->pushBoolean(true);
     value->beginDictionary();
     value->setInteger("i2", 3);
     value->endDictionary();
     value->endArray();
     value->setString("s0", "foo");
     String json = value->asTraceFormat();
     EXPECT_EQ("{\"i0\":2014,\"dict1\":{\"i1\":2014,\"dict2\":{\"b2\":false},\"s1\":\"foo\"},\"d0\":0,\"b0\":true,\"a1\":[1,true,{\"i2\":3}],\"s0\":\"foo\"}", json);
 }
 
-}
+} // namespace blink