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

Source/platform/transforms/TransformationMatrixTest.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/transforms/TransformationMatrix.h"
 
 #include <gtest/gtest.h>
 
-using namespace blink;
-namespace {
+namespace blink {
 
 TEST(TransformationMatrixTest, NonInvertableBlendTest)
 {
     TransformationMatrix from;
     TransformationMatrix to(2.7133590938, 0.0, 0.0, 0.0, 0.0, 2.4645137761, 0.0, 0.0, 0.0, 0.0, 0.00, 0.01, 0.02, 0.03, 0.04, 0.05);
     TransformationMatrix result;
 
     result = to;
     result.blend(from, 0.25);
     EXPECT_TRUE(result == from);
@@ skipping 30 matching lines @@
 }
 
 TEST(TransformationMatrixTest, To2DTranslation)
 {
     TransformationMatrix matrix;
     EXPECT_EQ(FloatSize(), matrix.to2DTranslation());
     matrix.translate(30, -40);
     EXPECT_EQ(FloatSize(30, -40), matrix.to2DTranslation());
 }
 
-} // namespace
+} // namespace blink