Fix unit test style in core/{animation,css,fetch,frame,layout,style,timing}/.

Source/core/css/DragUpdateTest.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 "core/dom/Element.h"
 #include "core/dom/StyleEngine.h"
 #include "core/frame/FrameView.h"
 #include "core/html/HTMLDocument.h"
 #include "core/html/HTMLElement.h"
 #include "core/layout/LayoutObject.h"
 #include "core/testing/DummyPageHolder.h"
 #include <gtest/gtest.h>
 
-using namespace blink;
-
-namespace {
+namespace blink {
 
 TEST(DragUpdateTest, AffectedByDragUpdate)
 {
     // Check that when dragging the div in the document below, you only get a
     // single element style recalc.
 
     OwnPtr<DummyPageHolder> dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
     HTMLDocument& document = toHTMLDocument(dummyPageHolder->document());
     document.documentElement()->setInnerHTML("<style>div {width:100px;height:100px} div:-webkit-drag { background-color: green }</style>"
         "<div>"
@@ skipping 33 matching lines @@
     unsigned startCount = document.styleEngine().resolverAccessCount();
 
     document.documentElement()->layoutObject()->updateDragState(true);
     document.updateLayout();
 
     unsigned accessCount = document.styleEngine().resolverAccessCount() - startCount;
 
     ASSERT_EQ(5U, accessCount);
 }
 
-} // namespace
+} // namespace blink