Remove GrRefCnt.h in favor of SkRefCnt.h

src/gpu/gl/GrGLContext.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 "GrGLContext.h"
 
 ////////////////////////////////////////////////////////////////////////////////
@@ skipping 55 matching lines @@
     fInterface = NULL;
     this->initialize(interface);
 }
 
 GrGLContext::GrGLContext(const GrGLContext& ctx) {
     fInterface = NULL;
     *this = ctx;
 }
 
 GrGLContext& GrGLContext::operator = (const GrGLContext& ctx) {
-    GrSafeAssign(fInterface, ctx.fInterface);
+    SkRefCnt_SafeAssign(fInterface, ctx.fInterface);
     fInfo = ctx.fInfo;
     return *this;
 }
 
 void GrGLContext::reset() {
-    GrSafeSetNull(fInterface);
+    SkSafeSetNull(fInterface);
     fInfo.reset();
 }
 
 bool GrGLContext::initialize(const GrGLInterface* interface) {
     if (fInfo.initialize(interface)) {
         fInterface = interface;
         interface->ref();
         return true;
     }
     return false;
 }