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

views/examples/button_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_BUTTON_EXAMPLE_H_
 #define VIEWS_EXAMPLES_BUTTON_EXAMPLE_H_
 
 #include "base/string_util.h"
 #include "views/controls/button/text_button.h"
 #include "views/examples/example_base.h"
+#include "views/fill_layout.h"
+#include "views/view.h"
 
 namespace examples {
 
 // ButtonExample simply counts the number of clicks.
-class ButtonExample : protected ExampleBase, private views::ButtonListener {
+class ButtonExample : public ExampleBase, public views::ButtonListener {
  public:
   explicit ButtonExample(ExamplesMain* main) : ExampleBase(main), count_(0) {
     button_ = new views::TextButton(this, L"Button");
   }
 
   virtual ~ButtonExample() {}
 
   virtual std::wstring GetExampleTitle() {
     return L"Text Button";
   }
 
-  virtual views::View* GetExampleView() {
-    return button_;
+  virtual void CreateExampleView(views::View* container) {
+    container->SetLayoutManager(new views::FillLayout);
+    container->AddChildView(button_);
   }
 
  private:
   // ButtonListner implementation.
   virtual void ButtonPressed(views::Button* sender, const views::Event& event) {
     PrintStatus(L"Pressed! count:%d", ++count_);
   }
 
   // The only control in this test.
   views::TextButton* button_;
 
   // The number of times the button is pressed.
   int count_;
 
   DISALLOW_COPY_AND_ASSIGN(ButtonExample);
 };
 
 }  // namespace examples
 
 #endif  // VIEWS_EXAMPLES_BUTTON_EXAMPLE_H_