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

Source/platform/fonts/GlyphBufferTest.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/fonts/GlyphBuffer.h"
 
 #include "platform/fonts/SimpleFontData.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 #include <gtest/gtest.h>
 
-using namespace blink;
+namespace blink {
 
 namespace {
 
 // Minimal TestSimpleFontData implementation.
 // Font has no glyphs, but that's okay.
 class TestSimpleFontData : public SimpleFontData {
 public:
     static PassRefPtr<TestSimpleFontData> create()
     {
         return adoptRef(new TestSimpleFontData);
     }
 
 private:
     TestSimpleFontData() : SimpleFontData(nullptr, 10, false, false) { }
 
     bool fillGlyphPage(GlyphPage* pageToFill, unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength) const override
     {
         return false;
     }
 };
 
+} // anonymous namespace
+
 TEST(GlyphBufferTest, StartsEmpty)
 {
     GlyphBuffer glyphBuffer;
     EXPECT_TRUE(glyphBuffer.isEmpty());
     EXPECT_EQ(0u, glyphBuffer.size());
 }
 
 TEST(GlyphBufferTest, StoresGlyphs)
 {
     RefPtr<SimpleFontData> font1 = TestSimpleFontData::create();
@@ skipping 169 matching lines @@
     EXPECT_EQ(43, glyphBuffer.glyphAt(1));
     EXPECT_EQ(42, glyphBuffer.glyphAt(2));
     EXPECT_EQ(font2.get(), glyphBuffer.fontDataAt(0));
     EXPECT_EQ(font1.get(), glyphBuffer.fontDataAt(1));
     EXPECT_EQ(font1.get(), glyphBuffer.fontDataAt(2));
     EXPECT_EQ(70, glyphBuffer.xOffsetAt(0));
     EXPECT_EQ(75, glyphBuffer.xOffsetAt(1));
     EXPECT_EQ(85, glyphBuffer.xOffsetAt(2));
 }
 
-} // namespace
+} // namespace blink