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

Source/core/animation/TimingCalculationsTest.cpp

Index: Source/core/animation/TimingCalculationsTest.cpp
diff --git a/Source/core/animation/TimingCalculationsTest.cpp b/Source/core/animation/TimingCalculationsTest.cpp
index bcaa94f62b14afae8b33857a181bf085059f1ef0..2b1897f41eef912052d76e872b4fe3ad82c2f9f5 100644
--- a/Source/core/animation/TimingCalculationsTest.cpp
+++ b/Source/core/animation/TimingCalculationsTest.cpp
@@ -33,9 +33,7 @@
 
 #include <gtest/gtest.h>
 
-using namespace blink;
-
-namespace {
+namespace blink {
 
 TEST(AnimationTimingCalculationsTest, ActiveTime)
 {
@@ -211,4 +209,4 @@ TEST(AnimationTimingCalculationsTest, TransformedTime)
     EXPECT_EQ(std::numeric_limits<double>::infinity(), calculateTransformedTime(0, std::numeric_limits<double>::infinity(), 1, timing));
 }
 
-}
+} // namespace blink