Cleanup: Go with SkDebugf instead of GrPrintf.

src/gpu/gl/GrGLExtensions.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 "gl/GrGLExtensions.h"
 #include "gl/GrGLDefines.h"
 #include "gl/GrGLUtil.h"
@@ skipping 120 matching lines @@
         SkTQSort(&fStrings->front(), &fStrings->back(), cmp);
     }
 }
 
 void GrGLExtensions::print(const char* sep) const {
     if (NULL == sep) {
         sep = " ";
     }
     int cnt = fStrings->count();
     for (int i = 0; i < cnt; ++i) {
-        GrPrintf("%s%s", (*fStrings)[i].c_str(), (i < cnt - 1) ? sep : "");
+        SkDebugf("%s%s", (*fStrings)[i].c_str(), (i < cnt - 1) ? sep : "");
     }
 }