Changes necessary to compile gpu demos on linux. It is not functional yet jus...

gpu/demos/framework/window_mac.mm

+// Copyright (c) 2010 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 "gpu/demos/framework/window.h"
+
+namespace gpu {
+namespace demos {
+
+void Window::MainLoop() {
+}
+
+gfx::NativeWindow Window::CreateNativeWindow(const wchar_t* title,
+                                             int width, int height) {
+  return NULL;
+}
+
+gfx::PluginWindowHandle Window::PluginWindow(gfx::NativeWindow hwnd) {
+  return gfx::kNullPluginWindow;
+}
+
+}  // namespace demos
+}  // namespace gpu
+