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/src/gpu/GrAAHairLinePathRenderer.cpp b/src/gpu/GrAAHairLinePathRenderer.cpp
index e4ee8a8..60992fd 100644
--- a/src/gpu/GrAAHairLinePathRenderer.cpp
+++ b/src/gpu/GrAAHairLinePathRenderer.cpp
@@ -166,7 +166,7 @@
 // Takes 178th time of logf on Z600 / VC2010
 int get_float_exp(float x) {
     GR_STATIC_ASSERT(sizeof(int) == sizeof(float));
-#if GR_DEBUG
+#ifdef SK_DEBUG
     static bool tested;
     if (!tested) {
         tested = true;