Initialize message pump not to use gtk. WindowSizer for aura

ui/aura/desktop.cc

 // Copyright (c) 2011 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/aura/desktop.h"
 
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "ui/aura/desktop_host.h"
 #include "ui/aura/root_window.h"
@@ skipping 16 matching lines @@
   host_->SetDesktop(this);
   DCHECK(compositor_.get());
   window_.reset(new internal::RootWindow);
 }
 
 Desktop::~Desktop() {
   if (instance_ == this)
     instance_ = NULL;
 }
 
+void Desktop::Init() {
+  window_->Init();
+  compositor()->set_root_layer(window_->layer());
+#if defined(USE_X11)
+  // TODO(oshima): Implement configure notify and remove this.
+  OnHostResized(host_->GetSize());
+#endif
+}
+
 void Desktop::Show() {
   host_->Show();
 }
 
 void Desktop::SetSize(const gfx::Size& size) {
   host_->SetSize(size);
 }
 
 void Desktop::Run() {
   Show();
@@ skipping 22 matching lines @@
   if (schedule_paint_.empty()) {
     MessageLoop::current()->PostTask(FROM_HERE,
         schedule_paint_.NewRunnableMethod(&Desktop::Draw));
   }
 }
 
 // static
 Desktop* Desktop::GetInstance() {
   if (!instance_) {
     instance_ = new Desktop;
-    instance_->window_->Init();
-    instance_->compositor()->set_root_layer(instance_->window_->layer());
+    instance_->Init();
   }
   return instance_;
 }
 
 }  // namespace aura