Implement Non-Closable Notification

ui/message_center/views/message_center_button_bar.h

Index: ui/message_center/views/message_center_button_bar.h
diff --git a/ui/message_center/views/message_center_button_bar.h b/ui/message_center/views/message_center_button_bar.h
index 74c7b84640513f62c96915c9243030c5d121251a..110aa298af19a18a158ce2f033a986dd7abe9c3b 100644
--- a/ui/message_center/views/message_center_button_bar.h
+++ b/ui/message_center/views/message_center_button_bar.h
@@ -7,6 +7,7 @@
 
 #include "base/macros.h"
 #include "build/build_config.h"
+#include "ui/message_center/message_center_export.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/view.h"
@@ -43,10 +44,14 @@ class MessageCenterButtonBar : public views::View,
   // Sometimes we shouldn't see the close-all button.
   void SetCloseAllButtonEnabled(bool enabled);
 
+  MESSAGE_CENTER_EXPORT views::Button* GetCloseAllButtonForTest() const;
+
   // Sometimes we shouldn't see the back arrow (not in settings).
   void SetBackArrowVisible(bool visible);
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(MessageCenterViewTest, CloseButton);

[dewittj, 2016/02/03 19:31:37]

Why do you need this if you have the ForTest() method?  If it's for the
ButtonPressed method, then possibly you should just upcast it to ButtonListener
and call the public method from that interface.

[yoshiki, 2016/02/07 17:49:41]

Done.

+
   // Updates the layout manager which can have differing configuration
   // depending on the visibility of different parts of the button bar.
   void ViewVisibilityChanged();