Revert of Return GrGLContext from GrTestTarget

src/gpu/gl/GrGLContext.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrGLContext_DEFINED
 #define GrGLContext_DEFINED
 
 #include "gl/GrGLExtensions.h"
 #include "gl/GrGLInterface.h"
 #include "GrGLCaps.h"
 #include "GrGLUtil.h"
 
 struct GrContextOptions;
 
 /**
  * Encapsulates information about an OpenGL context including the OpenGL
  * version, the GrGLStandard type of the context, and GLSL version.
  */
-class GrGLContextInfo : public SkRefCnt {
+class GrGLContextInfo : public SkNoncopyable {
 public:
     GrGLStandard standard() const { return fInterface->fStandard; }
     GrGLVersion version() const { return fGLVersion; }
     GrGLSLGeneration glslGeneration() const { return fGLSLGeneration; }
     GrGLVendor vendor() const { return fVendor; }
     GrGLRenderer renderer() const { return fRenderer; }
     /** What driver is running our GL implementation? This is not necessarily related to the vendor.
         (e.g. Intel GPU being driven by Mesa) */
     GrGLDriver driver() const { return fDriver; }
     GrGLDriverVersion driverVersion() const { return fDriverVersion; }
@@ skipping 42 matching lines @@
 
     const GrGLInterface* interface() const { return fInterface; }
 
 private:
     GrGLContext(const ConstructorArgs& args) : INHERITED(args) {}
 
     typedef GrGLContextInfo INHERITED;
 };
 
 #endif