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/GrBufferAllocPool.cpp b/src/gpu/GrBufferAllocPool.cpp
index b503e24..887f8cd 100644
--- a/src/gpu/GrBufferAllocPool.cpp
+++ b/src/gpu/GrBufferAllocPool.cpp
@@ -14,7 +14,7 @@
 #include "GrTypes.h"
 #include "GrVertexBuffer.h"
 
-#if GR_DEBUG
+#ifdef SK_DEBUG
     #define VALIDATE validate
 #else
     static void VALIDATE(bool = false) {}
@@ -117,7 +117,7 @@
     VALIDATE();
 }
 
-#if GR_DEBUG
+#ifdef SK_DEBUG
 void GrBufferAllocPool::validate(bool unusedBlockAllowed) const {
     if (NULL != fBufferPtr) {
         SkASSERT(!fBlocks.empty());