GPU: Keep track of the last real context and real surface made current.

ui/gl/gl_context_osmesa.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 "ui/gl/gl_context_osmesa.h"
 
 #include <GL/osmesa.h>
 
 #include "base/logging.h"
 #include "ui/gfx/size.h"
@@ skipping 79 matching lines @@
 
 bool GLContextOSMesa::IsCurrent(GLSurface* surface) {
   DCHECK(context_);
 
   bool native_context_is_current =
       context_ == OSMesaGetCurrentContext();
 
   // If our context is current then our notion of which GLContext is
   // current must be correct. On the other hand, third-party code
   // using OpenGL might change the current context.
-  DCHECK(!native_context_is_current || (GetCurrent() == this));
+  DCHECK(!native_context_is_current || (GetRealCurrent() == this));
 
   if (!native_context_is_current)
     return false;
 
   if (surface) {
     GLint width;
     GLint height;
     GLint format;
     void* buffer = NULL;
     OSMesaGetColorBuffer(context_, &width, &height, &format, &buffer);
@@ skipping 11 matching lines @@
 void GLContextOSMesa::SetSwapInterval(int interval) {
   DCHECK(IsCurrent(NULL));
   DLOG(INFO) << "GLContextOSMesa::SetSwapInterval is ignored.";
 }
 
 GLContextOSMesa::~GLContextOSMesa() {
   Destroy();
 }
 
 }  // namespace gfx