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/GrBinHashKey.h b/src/gpu/GrBinHashKey.h
index 5bbea07..7d4aa0f 100644
--- a/src/gpu/GrBinHashKey.h
+++ b/src/gpu/GrBinHashKey.h
@@ -46,7 +46,7 @@
 
     void reset() {
         fHash = 0;
-#if GR_DEBUG
+#ifdef SK_DEBUG
         fIsValid = false;
 #endif
     }
@@ -66,7 +66,7 @@
         hash += (fHash << 3);
         hash ^= (fHash >> 11);
         hash += (fHash << 15);
-#if GR_DEBUG
+#ifdef SK_DEBUG
         fIsValid = true;
 #endif
         fHash = hash;
@@ -101,7 +101,7 @@
     uint32_t            fHash;
     uint8_t             fData[KEY_SIZE];  // Buffer for key storage
 
-#if GR_DEBUG
+#ifdef SK_DEBUG
 public:
     bool                fIsValid;
 #endif