gl: Clean up gfx::AcceleratedWidget usage in gl_surface_egl

ui/gl/gl_surface_win.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_surface.h"
 
 #include <dwmapi.h>
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/win/windows_version.h"
 #include "third_party/mesa/src/include/GL/osmesa.h"
 #include "ui/gfx/frame_time.h"
+#include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface_egl.h"
 #include "ui/gl/gl_surface_osmesa.h"
 #include "ui/gl/gl_surface_stub.h"
 #include "ui/gl/gl_surface_wgl.h"
 
 namespace gfx {
 
 // This OSMesa GL surface can use GDI to swap the contents of the buffer to a
@@ skipping 196 matching lines @@
   switch (GetGLImplementation()) {
     case kGLImplementationOSMesaGL: {
       scoped_refptr<GLSurface> surface(
           new NativeViewGLSurfaceOSMesa(window));
       if (!surface->Initialize())
         return NULL;
 
       return surface;
     }
     case kGLImplementationEGLGLES2: {
+      DCHECK(window != gfx::kNullAcceleratedWidget);
       scoped_refptr<NativeViewGLSurfaceEGL> surface(
           new NativeViewGLSurfaceEGL(window));
       scoped_ptr<VSyncProvider> sync_provider;
       if (base::win::GetVersion() >= base::win::VERSION_VISTA)
         sync_provider.reset(new DWMVSyncProvider);
       if (!surface->Initialize(sync_provider.Pass()))
         return NULL;
 
       return surface;
     }
@@ skipping 41 matching lines @@
     }
     case kGLImplementationMockGL:
       return new GLSurfaceStub;
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
 }  // namespace gfx