Revert of Move SkGLContext and some GrGLInterface implementations to skgputest module

tools/gpu/gl/debug/GrTextureUnitObj.h

-/*
- * Copyright 2012 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrTextureUnitObj_DEFINED
-#define GrTextureUnitObj_DEFINED
-
-#include "GrFakeRefObj.h"
-class GrTextureObj;
-
-////////////////////////////////////////////////////////////////////////////////
-// Although texture unit objects are allocated & deallocated like the other
-// GL emulation objects they are derived from GrFakeRefObj to provide some
-// uniformity in how the debug interface class manages resources
-class GrTextureUnitObj : public GrFakeRefObj {
-    GR_DEFINE_CREATOR(GrTextureUnitObj);
-
-public:
-    GrTextureUnitObj()
-        : GrFakeRefObj()
-        , fNumber(0)
-        , fTexture(nullptr) {
-    }
-
-    void setNumber(GrGLenum number) {
-        fNumber = number;
-    }
-    GrGLenum getNumber() const { return fNumber; }
-
-    void setTexture(GrTextureObj *texture);
-    GrTextureObj *getTexture()                  { return fTexture; }
-
-protected:
-private:
-    GrGLenum fNumber;
-    GrTextureObj *fTexture;
-
-    typedef GrFakeRefObj INHERITED;
-};
-
-#endif // GrTextureUnitObj_DEFINED