Replace uses of GR_DEBUG by SK_DEBUG.

BUG=None
R=bsalomon@google.com, robertphillips@google.com

Author: tfarina@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23137022

git-svn-id: http://skia.googlecode.com/svn/trunk@10978 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/LListTest.cpp b/tests/LListTest.cpp
index 7c03ab5..88fe11d 100644
--- a/tests/LListTest.cpp
+++ b/tests/LListTest.cpp
@@ -38,7 +38,7 @@
                        ListElement elements[4]) {
 
     REPORTER_ASSERT(reporter, empty == list.isEmpty());
-#if SK_DEBUG
+#ifdef SK_DEBUG
     list.validate();
     REPORTER_ASSERT(reporter, numElements == list.countEntries());
     REPORTER_ASSERT(reporter, in0 == list.isInList(&elements[0]));