Remove unnamed namespace usage from tests/

tests/PixelRefTest.cpp

Index: tests/PixelRefTest.cpp
diff --git a/tests/PixelRefTest.cpp b/tests/PixelRefTest.cpp
index d7fe9f47aad51a6d0f77e1986b1289d68ef458bd..1e9bbe7a3bb7c4a2ac071d5159cd1c97eee57851 100644
--- a/tests/PixelRefTest.cpp
+++ b/tests/PixelRefTest.cpp
@@ -37,18 +37,14 @@ static void test_info(skiatest::Reporter* reporter) {
     }
 }
 
-namespace {
-
 class TestListener : public SkPixelRef::GenIDChangeListener {
 public:
     explicit TestListener(int* ptr) : fPtr(ptr) {}
-    void onChange() SK_OVERRIDE { (*fPtr)++; }
+    virtual void onChange() SK_OVERRIDE { (*fPtr)++; }
 private:
     int* fPtr;
 };
 
-}  // namespace
-
 DEF_TEST(PixelRef_GenIDChange, r) {
     SkImageInfo info = SkImageInfo::MakeN32Premul(10, 10);