Rationalize linux vs x11 in ui

ui/gl/gl_image_linux.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_image.h"
-
-#include "base/debug/trace_event.h"
-#include "ui/gl/gl_image_glx.h"
-#include "ui/gl/gl_image_stub.h"
-#include "ui/gl/gl_implementation.h"
-
-namespace gfx {
-
-scoped_refptr<GLImage> GLImage::CreateGLImage(gfx::PluginWindowHandle window) {
-  TRACE_EVENT0("gpu", "GLImage::CreateGLImage");
-  switch (GetGLImplementation()) {
-    case kGLImplementationOSMesaGL:
-      return NULL;
-    case kGLImplementationDesktopGL: {
-      scoped_refptr<GLImageGLX> image(new GLImageGLX(window));
-      if (!image->Initialize())
-        return NULL;
-
-      return image;
-    }
-    case kGLImplementationEGLGLES2:
-      return NULL;
-    case kGLImplementationMockGL:
-      return new GLImageStub;
-    default:
-      NOTREACHED();
-      return NULL;
-  }
-}
-
-scoped_refptr<GLImage> GLImage::CreateGLImageForGpuMemoryBuffer(
-    gfx::GpuMemoryBufferHandle buffer, gfx::Size size) {
-  TRACE_EVENT0("gpu", "GLImage::CreateGLImageForGpuMemoryBuffer");
-  switch (GetGLImplementation()) {
-    case kGLImplementationOSMesaGL:
-    case kGLImplementationDesktopGL:
-    case kGLImplementationEGLGLES2:
-      return NULL;
-    case kGLImplementationMockGL:
-      return new GLImageStub;
-    default:
-      NOTREACHED();
-      return NULL;
-  }
-}
-
-}  // namespace gfx