aura: Unify WindowTreeHost for some platforms

ui/platform_window/x11/x11_window.cc

 // Copyright 2014 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/platform_window/x11/x11_window.h"
 
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 
 #include "ui/events/devices/x11/touch_factory_x11.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/platform/platform_event_dispatcher.h"
 #include "ui/events/platform/platform_event_source.h"
 #include "ui/events/platform/x11/x11_event_source.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/x/x11_atom_cache.h"
 #include "ui/gfx/x/x11_types.h"
 #include "ui/platform_window/platform_window_delegate.h"
 
 namespace ui {
 
+// static
+scoped_ptr<PlatformWindow> PlatformWindow::Create(
+    PlatformWindowDelegate* delegate,
+    const gfx::Rect& bounds) {
+  return new X11Window(delegate);
+}
+
 namespace {
 
 const char* kAtomsToCache[] = {
   "WM_DELETE_WINDOW",
   "_NET_WM_PING",
   "_NET_WM_PID",
   NULL
 };
 
 XID FindXEventTarget(XEvent* xevent) {
@@ skipping 340 matching lines @@
 }
 
 namespace test {
 
 void SetUseOverrideRedirectWindowByDefault(bool override_redirect) {
   g_override_redirect = override_redirect;
 }
 
 }  // namespace test
 }  // namespace ui