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

views/examples/message_box_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_MESSAGE_BOX_EXAMPLE_H_
 #define VIEWS_EXAMPLES_MESSAGE_BOX_EXAMPLE_H_
 
 #include "base/compiler_specific.h"
 #include "base/string_util.h"
 #include "views/controls/button/text_button.h"
 #include "views/controls/message_box_view.h"
 #include "views/controls/tabbed_pane/tabbed_pane.h"
 #include "views/examples/example_base.h"
 #include "views/grid_layout.h"
 
 namespace examples {
 
 // A MessageBoxView example. This tests some of checkbox features as well.
-class MessageBoxExample : protected ExampleBase, private views::ButtonListener {
+class MessageBoxExample : public ExampleBase,
+                          public views::ButtonListener {
  public:
-  explicit MessageBoxExample(ExamplesMain* main) : ExampleBase(main) {
+  explicit MessageBoxExample(ExamplesMain* main) : ExampleBase(main) {}
+
+  virtual ~MessageBoxExample() {}
+
+  virtual std::wstring GetExampleTitle() {
+    return L"Message Box View";
+  }
+
+  virtual void CreateExampleView(views::View* container) {
     message_box_view_ =
         new MessageBoxView(0, L"Message Box Message", L"Default Prompt");
     status_ = new views::TextButton(this, L"Show Status");
     toggle_ = new views::TextButton(this, L"Toggle Checkbox");
 
-    container_ = new views::View();
-    views::GridLayout* layout = new views::GridLayout(container_);
-    container_->SetLayoutManager(layout);
+    views::GridLayout* layout = new views::GridLayout(container);
+    container->SetLayoutManager(layout);
 
     message_box_view_->SetCheckBoxLabel(L"Check Box");
 
     const int message_box_column = 0;
     views::ColumnSet* column_set = layout->AddColumnSet(message_box_column);
     column_set->AddColumn(views::GridLayout::FILL, views::GridLayout::FILL, 1,
                           views::GridLayout::USE_PREF, 0, 0);
     layout->StartRow(1 /* expand */, message_box_column);
     layout->AddView(message_box_view_);
 
     const int button_column = 1;
     column_set = layout->AddColumnSet(button_column);
     column_set->AddColumn(views::GridLayout::FILL, views::GridLayout::FILL,
                           0.5f, views::GridLayout::USE_PREF, 0, 0);
     column_set->AddColumn(views::GridLayout::FILL, views::GridLayout::FILL,
                           0.5f, views::GridLayout::USE_PREF, 0, 0);
 
     layout->StartRow(0 /* no expand */, button_column);
 
     layout->AddView(status_);
     layout->AddView(toggle_);
   }
 
-  virtual ~MessageBoxExample() {}
-
-  virtual std::wstring GetExampleTitle() {
-    return L"Message Box View";
-  }
-
-  virtual views::View* GetExampleView() {
-    return container_;
-  }
-
  private:
   // ButtonListener overrides.
   virtual void ButtonPressed(views::Button* sender, const views::Event& event) {
     if (sender == status_) {
       message_box_view_->SetCheckBoxLabel(
           IntToOnOff(message_box_view_->IsCheckBoxSelected()));
       PrintStatus(message_box_view_->IsCheckBoxSelected() ?
                    L"Check Box Selected" : L"Check Box Not Selected");
     } else if (sender == toggle_) {
       message_box_view_->SetCheckBoxSelected(
           !message_box_view_->IsCheckBoxSelected());
     }
   }
 
-  // The view containing this test's controls.
-  views::View* container_;
-
   // The MessageBoxView to be tested.
   MessageBoxView* message_box_view_;
 
   // Control buttons to show the status and toggle checkbox in the
   // message box.
   views::Button* status_, *toggle_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageBoxExample);
 };
 
 }  // namespace examples
 
 #endif  // VIEWS_EXAMPLES_MESSAGE_BOX_EXAMPLE_H_