Cleanup: remove GTK stuff

ui/views/examples/example_base.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/views/examples/example_base.h"
 
 #include <stdarg.h>
 
 #include "base/compiler_specific.h"
 #include "base/stringprintf.h"
 #include "ui/views/view.h"
 
 namespace views {
 namespace examples {
 
 // Logs the specified string to the status area of the examples window.
 // This function can only be called if there is a visible examples window.
 void LogStatus(const std::string& status);
 
 namespace {
 
-// Some of GTK based view classes require NativeWidgetGtk in the view
-// parent chain. This class is used to defer the creation of such
-// views until a NativeWidgetGtk is added to the view hierarchy.
+// TODO(oshima): Check if this special container is still necessary.
 class ContainerView : public View {
  public:
   explicit ContainerView(ExampleBase* base)
       : example_view_created_(false),
         example_base_(base) {
   }
 
  private:
   // Overridden from View:
   virtual void ViewHierarchyChanged(bool is_add,
@@ skipping 28 matching lines @@
 void ExampleBase::PrintStatus(const char* format, ...) {
   va_list ap;
   va_start(ap, format);
   std::string msg;
   base::StringAppendV(&msg, format, ap);
   LogStatus(msg);
 }
 
 }  // namespace examples
 }  // namespace views