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

Source/platform/geometry/FloatBoxTest.cpp

 /*
  * Copyright (C) 2014 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
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES,:tabnew INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "platform/geometry/FloatBox.h"
 
 #include "platform/geometry/FloatBoxTestHelpers.h"
-
 #include <gtest/gtest.h>
 
-using namespace blink;
-
-namespace {
+namespace blink {
 
 TEST(FloatBoxTest, SimpleCreationTest)
 {
     FloatBox box(1, 2, 3, 4, 5, 6);
     EXPECT_EQ(1, box.x());
     EXPECT_EQ(2, box.y());
     EXPECT_EQ(3, box.z());
     EXPECT_EQ(4, box.width());
     EXPECT_EQ(5, box.height());
     EXPECT_EQ(6, box.depth());
@@ skipping 66 matching lines @@
 TEST(FloatBoxTest, EmptyBoxTest)
 {
     FloatBox box;
     EXPECT_TRUE(box.isEmpty());
     box.expandTo(FloatPoint3D(1, 0, 0));
     EXPECT_TRUE(box.isEmpty());
     box.expandTo(FloatPoint3D(0, 1, 0));
     EXPECT_FALSE(box.isEmpty());
 }
 
-}
+} // namespace blink