Use DEFINE_TESTCLASS_SHORT macro in tests.

The three version of DEFINE_TESTCLASS macro is deprecated and thus just
use the simple, short one.

BUG=None
TEST=out/Debug/tests
R=mtklein@google.com, bsalomon@google.com, robertphillips@google.com

Review URL: https://codereview.chromium.org/100113004

git-svn-id: http://skia.googlecode.com/svn/trunk@12653 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/PackBitsTest.cpp b/tests/PackBitsTest.cpp
index f7d4b8e..8a6ed88 100644
--- a/tests/PackBitsTest.cpp
+++ b/tests/PackBitsTest.cpp
@@ -1,11 +1,12 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
+
 #include "Test.h"
+#include "TestClassDef.h"
 #include "SkPackBits.h"
 
 static const uint16_t gTest0[] = { 0, 0, 1, 1 };
@@ -125,10 +126,7 @@
     }
 }
 
-static void TestPackBits(skiatest::Reporter* reporter) {
+DEF_TEST(PackBits, reporter) {
     test_pack8(reporter);
     test_pack16(reporter);
 }
-
-#include "TestClassDef.h"
-DEFINE_TESTCLASS("PackBits", PackBitsTestClass, TestPackBits)