Replace uses of GR_DEBUG by SK_DEBUG.

src/gpu/gl/GrGLBufferImpl.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLBufferImpl.h"
 #include "GrGpuGL.h"
 
 #define GL_CALL(GPU, X) GR_GL_CALL(GPU->glInterface(), X)
 
-#if GR_DEBUG
+#ifdef SK_DEBUG
 #define VALIDATE() this->validate()
 #else
 #define VALIDATE() do {} while(false)
 #endif
 
 // GL_STREAM_DRAW triggers an optimization in Chromium's GPU process where a client's vertex buffer
 // objects are implemented as client-side-arrays on tile-deferred architectures.
 #define DYNAMIC_USAGE_PARAM GR_GL_STREAM_DRAW
 
 GrGLBufferImpl::GrGLBufferImpl(GrGpuGL* gpu, const Desc& desc, GrGLenum bufferType)
@@ skipping 132 matching lines @@
     return true;
 }
 
 void GrGLBufferImpl::validate() const {
     SkASSERT(GR_GL_ARRAY_BUFFER == fBufferType || GR_GL_ELEMENT_ARRAY_BUFFER == fBufferType);
     // The following assert isn't valid when the buffer has been abandoned:
     // SkASSERT((0 == fDesc.fID) == (NULL != fCPUData));
     SkASSERT(0 != fDesc.fID || !fDesc.fIsWrapped);
     SkASSERT(NULL == fCPUData || NULL == fLockPtr || fCPUData == fLockPtr);
 }