Fixed view example. It was failing because some of view classes requires WidgetGTK in

views/examples/combobox_example.h

 // Copyright (c) 2009 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.
 
 #ifndef VIEWS_EXAMPLES_COMBOBOX_EXAMPLE_H_
 #define VIEWS_EXAMPLES_COMBOBOX_EXAMPLE_H_
 
 #include "app/combobox_model.h"
 #include "base/string_util.h"
 #include "views/controls/combobox/combobox.h"
 #include "views/examples/example_base.h"
+#include "views/fill_layout.h"
 
 namespace examples {
 
 // ComboboxExample
 class ComboboxExample : public ExampleBase, public views::Combobox::Listener {
  public:
   explicit ComboboxExample(ExamplesMain* main) : ExampleBase(main) {
     combobox_ = new views::Combobox(new ComboboxModelExample());
     combobox_->set_listener(this);
   }
   virtual ~ComboboxExample() {}
 
   virtual std::wstring GetExampleTitle() {
     return L"Combo Box";
   }
 
-  virtual views::View* GetExampleView() {
-    return combobox_;
+  virtual void CreateExampleView(views::View* container) {
+    container->SetLayoutManager(new views::FillLayout);
+    container->AddChildView(combobox_);
   }
 
  private:
   // An sample combobox model that generates list of "Item <index>".
   class ComboboxModelExample : public ComboboxModel {
    public:
     ComboboxModelExample() {}
     virtual ~ComboboxModelExample() {}
 
     virtual int GetItemCount() {
@@ skipping 19 matching lines @@
   // This test only control.
   views::Combobox* combobox_;
 
   DISALLOW_COPY_AND_ASSIGN(ComboboxExample);
 };
 
 }  // namespace examples
 
 #endif  // VIEWS_EXAMPLES_COMBOBOX_EXAMPLE_H_
 
-