views examples: remove obsolete CTA button example

ui/views/examples/button_example.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/button_example.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/image/image.h"
 #include "ui/resources/grit/ui_resources.h"
@@ skipping 50 matching lines @@
 
   md_button_ =
       MdTextButton::Create(this, base::ASCIIToUTF16("Material design"));
   container->AddChildView(md_button_);
 
   md_default_button_ =
       MdTextButton::Create(this, base::ASCIIToUTF16("Default"));
   md_default_button_->SetIsDefault(true);
   container->AddChildView(md_default_button_);
 
-  md_prominent_button_ =

[sky, 2016/11/07 17:03:31]

Remove field too.

-      MdTextButton::Create(this, base::ASCIIToUTF16("Call to action"));
-  md_prominent_button_->SetProminent(true);
-  container->AddChildView(md_prominent_button_);
-
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
   image_button_ = new ImageButton(this);
   image_button_->SetFocusForPlatform();
   image_button_->set_request_focus_on_press(true);
   image_button_->SetImage(ImageButton::STATE_NORMAL,
                           rb.GetImageNamed(IDR_CLOSE).ToImageSkia());
   image_button_->SetImage(ImageButton::STATE_HOVERED,
                           rb.GetImageNamed(IDR_CLOSE_H).ToImageSkia());
   image_button_->SetImage(ImageButton::STATE_PRESSED,
                           rb.GetImageNamed(IDR_CLOSE_P).ToImageSkia());
@@ skipping 48 matching lines @@
   } else if (sender == md_button_ || sender == md_default_button_ ||
              sender == md_prominent_button_) {
     static_cast<CustomButton*>(sender)->StartThrobbing(5);
   } else {
     PrintStatus("Image Button Pressed! count: %d", ++count_);
   }
 }
 
 }  // namespace examples
 }  // namespace views