RefCounted types should not have public destructors, Linux fixes

ui/gl/gl_context_glx.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.
 
 extern "C" {
 #include <X11/Xlib.h>
 }
 
 #include "ui/gl/gl_context_glx.h"
 
@@ skipping 20 matching lines @@
 };
 
 }  // namespace anonymous
 
 GLContextGLX::GLContextGLX(GLShareGroup* share_group)
   : GLContext(share_group),
     context_(NULL),
     display_(NULL) {
 }
 
-GLContextGLX::~GLContextGLX() {
-  Destroy();
-}
-
 Display* GLContextGLX::display() {
   return display_;
 }
 
 bool GLContextGLX::Initialize(
     GLSurface* compatible_surface, GpuPreference gpu_preference) {
   display_ = static_cast<Display*>(compatible_surface->GetDisplay());
 
   GLXContext share_handle = static_cast<GLXContext>(
       share_group() ? share_group()->GetHandle() : NULL);
@@ skipping 188 matching lines @@
     return GLContext::GetExtensions() + " " + extensions;
   }
 
   return GLContext::GetExtensions();
 }
 
 bool GLContextGLX::WasAllocatedUsingARBRobustness() {
   return GLSurfaceGLX::IsCreateContextRobustnessSupported();
 }
 
+GLContextGLX::~GLContextGLX() {
+  Destroy();
+}
+
 }  // namespace gfx