Made notification center notifications collapsed and expandable.

ui/message_center/notifier_settings_view.cc

 // Copyright (c) 2013 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/message_center/notifier_settings_view.h"
 
 #include "grit/ui_strings.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/size.h"
@@ skipping 64 matching lines @@
 
   bool checked() const {
     return checkbox_->checked();
   }
 
   const Notifier& notifier() const {
     return *notifier_.get();
   }
 
  private:
-  // views::ButtonListener overrides:
+  // Overridden from views::ButtonListener:
   virtual void ButtonPressed(views::Button* button,
                              const ui::Event& event) OVERRIDE {
     DCHECK(button == checkbox_);
     // The checkbox state has already changed at this point, but we'll update
     // the state on NotifierSettingsView::ButtonPressed() too, so here change
     // back to the previous state.
     checkbox_->SetChecked(!checkbox_->checked());
     CustomButton::NotifyClick(event);
   }
 
@@ skipping 95 matching lines @@
   std::set<NotifierButton*>::iterator iter = buttons_.find(
       static_cast<NotifierButton*>(sender));
   DCHECK(iter != buttons_.end());
 
   (*iter)->SetChecked(!(*iter)->checked());
   if (delegate_)
     delegate_->SetNotifierEnabled((*iter)->notifier(), (*iter)->checked());
 }
 
 }  // namespace message_center