Revert of Use the desktop GL core profile on Linux when ES3 support is requested.

ui/gl/gl_context_x11.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.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/gl/gl_bindings.h"
@@ skipping 17 matching lines @@
     GpuPreference gpu_preference) {
   TRACE_EVENT0("gpu", "GLContext::CreateGLContext");
   switch (GetGLImplementation()) {
     case kGLImplementationOSMesaGL: {
       scoped_refptr<GLContext> context(new GLContextOSMesa(share_group));
       if (!context->Initialize(compatible_surface, gpu_preference))
         return NULL;
 
       return context;
     }
-    case kGLImplementationDesktopGL:
-    case kGLImplementationDesktopGLCoreProfile: {
+    case kGLImplementationDesktopGL: {
       scoped_refptr<GLContext> context(new GLContextGLX(share_group));
       if (!context->Initialize(compatible_surface, gpu_preference))
         return NULL;
 
       return context;
     }
     case kGLImplementationEGLGLES2: {
       scoped_refptr<GLContext> context(new GLContextEGL(share_group));
       if (!context->Initialize(compatible_surface, gpu_preference))
         return NULL;
 
       return context;
     }
     case kGLImplementationMockGL:
       return new GLContextStub;
     default:
       NOTREACHED();
       return NULL;
   }
 }
 
 }  // namespace gfx