Revert of Make the Sk GL context class an abstract base class

src/gpu/gl/debug/GrGLCreateDebugInterface.cpp

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "gl/GrGLInterface.h"
@@ skipping 801 matching lines @@
     //      contexts. The natural way to do this is to have multiple debug
     //      interfaces. Each of which represents a separate context. The
     //      static ID count would still uniquify IDs across all of them.
     //      The problem then is that we couldn't treat the debug GL
     //      interface as a singleton (since there would be one for each
     //      context).
     //
     //      The solution to this is probably to alter SkDebugGlContext's
     //      "makeCurrent" method to make a call like "makeCurrent(this)" to
     //      the debug GL interface (assuming that the application will create
-    //      multiple SkGLContext's) to let it switch between the active
+    //      multiple SkGLContextHelper's) to let it switch between the active
     //      context. Everything in the GrDebugGL object would then need to be
     //      moved to a GrContextObj and the GrDebugGL object would just switch
     //      between them. Note that this approach would also require that
     //      SkDebugGLContext wrap an arbitrary other context
     //      and then pass the wrapped interface to the debug GL interface.
 
 protected:
 private:
 
     SkAutoTUnref<GrGLInterface> fWrapped;
@@ skipping 140 matching lines @@
     functions->fMatrixLoadIdentity = noOpGLMatrixLoadIdentity;
 
     functions->fBindFragDataLocationIndexed =
                                     noOpGLBindFragDataLocationIndexed;
 
     interface->fExtensions.init(kGL_GrGLStandard, functions->fGetString, functions->fGetStringi,
                                 functions->fGetIntegerv);
 
     return interface;
 }