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

Source/platform/ClockTest.cpp

Index: Source/platform/ClockTest.cpp
diff --git a/Source/platform/ClockTest.cpp b/Source/platform/ClockTest.cpp
index 737a035228484862d18ea5da2d32c6f23c096683..36169807f31e99a76b933ce4783e939442a68ffd 100644
--- a/Source/platform/ClockTest.cpp
+++ b/Source/platform/ClockTest.cpp
@@ -32,12 +32,9 @@
 #include "platform/Clock.h"
 
 #include "wtf/OwnPtr.h"
-
 #include <gtest/gtest.h>
 
-using blink::Clock;
-
-namespace {
+namespace blink {
 
 TEST(Clock, StartStop)
 {
@@ -58,4 +55,4 @@ TEST(Clock, SetCurrentTimeThenStartStop)
     EXPECT_TRUE(clock->currentTime() >= 10.0);
 }
 
-} // namespace
+} // namespace blink