views examples: remove obsolete CTA button example

ui/views/examples/button_example.cc

Index: ui/views/examples/button_example.cc
diff --git a/ui/views/examples/button_example.cc b/ui/views/examples/button_example.cc
index de882104bc39468e1e0ec4ba5eb4fc1183f7ab03..b2d5fc8791a26bf039f4f6707202c1ac65545524 100644
--- a/ui/views/examples/button_example.cc
+++ b/ui/views/examples/button_example.cc
@@ -68,11 +68,6 @@ void ButtonExample::CreateExampleView(View* container) {
   md_default_button_->SetIsDefault(true);
   container->AddChildView(md_default_button_);
 
-  md_prominent_button_ =
-      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();
@@ -125,18 +120,16 @@ void ButtonExample::LabelButtonPressed(LabelButton* label_button,
 }
 
 void ButtonExample::ButtonPressed(Button* sender, const ui::Event& event) {
-  if (sender == label_button_) {
+  if (sender == label_button_)
     LabelButtonPressed(label_button_, event);
-  } else if (sender == styled_button_) {
+  else if (sender == styled_button_)
     LabelButtonPressed(styled_button_, event);
-  } else if (sender == disabled_button_) {
+  else if (sender == disabled_button_)
     LabelButtonPressed(disabled_button_, event);
-  } else if (sender == md_button_ || sender == md_default_button_ ||
-             sender == md_prominent_button_) {
+  else if (sender == md_button_ || sender == md_default_button_)
     static_cast<CustomButton*>(sender)->StartThrobbing(5);
-  } else {
+  else
     PrintStatus("Image Button Pressed! count: %d", ++count_);
-  }
 }
 
 }  // namespace examples