Remove unnamed namespace usage from tests.

tests/OnceTest.cpp

Index: tests/OnceTest.cpp
diff --git a/tests/OnceTest.cpp b/tests/OnceTest.cpp
index 74c88a40e19642796a2ca864d033a282e59ba896..6c485a0f0ae35ba7e06be9aa3b376068a1ccaa7a 100644
--- a/tests/OnceTest.cpp
+++ b/tests/OnceTest.cpp
@@ -27,13 +27,10 @@ DEF_TEST(SkOnce_Singlethreaded, r) {
     REPORTER_ASSERT(r, 5 == x);
 }
 
-
 DEF_SK_ONCE(add_six, int* x) {
     *x += 6;
 }
 
-namespace {
-
 class Racer : public SkRunnable {
 public:
     int* ptr;
@@ -42,8 +39,6 @@ public:
     }
 };
 
-}  // namespace
-
 DEF_TEST(SkOnce_Multithreaded, r) {
     const int kTasks = 16, kThreads = 4;