Refactor GL bindings so there is no global GLApi or DriverGL.

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 4837 matching lines @@
   // ShaderTranslatorCache.
   fragment_translator_ = NULL;
   vertex_translator_ = NULL;
 
   // Destroy the GPU Tracer which may own some in process GPU Timings.
   if (gpu_tracer_) {
     gpu_tracer_->Destroy(have_context);
     gpu_tracer_.reset();
   }
 
+  // Destroy the surface before the context, some surface destructors make GL
+  // calls.
+  surface_ = nullptr;
+
   if (group_.get()) {
     group_->Destroy(this, have_context);
     group_ = NULL;
   }
 
   if (context_.get()) {
     context_->ReleaseCurrent(NULL);
     context_ = NULL;
   }
 }
@@ skipping 14357 matching lines @@
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu