cros system menu - fix back and settings buttons in IME detailed view.

ash/common/system/tray/tray_details_view.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 "ash/common/system/tray/tray_details_view.h"
 
 #include "ash/common/ash_view_ids.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/system/tray/fixed_sized_scroll_view.h"
 #include "ash/common/system/tray/system_tray.h"
@@ skipping 336 matching lines @@
     progress_bar_ = new views::ProgressBar(kTitleRowProgressBarHeight);
     progress_bar_->SetVisible(false);
     AddChildViewAt(progress_bar_, kTitleRowSeparatorIndex + 1);
   }
 
   progress_bar_->SetValue(value);
   progress_bar_->SetVisible(visible);
   child_at(kTitleRowSeparatorIndex)->SetVisible(!visible);
 }
 
-void TrayDetailsView::HandleViewClicked(views::View* view) {}
+void TrayDetailsView::HandleViewClicked(views::View* view) {
+  NOTREACHED();
+}
 
 void TrayDetailsView::HandleButtonPressed(views::Button* sender,
-                                          const ui::Event& event) {}
+                                          const ui::Event& event) {
+  NOTREACHED();
+}
 
 void TrayDetailsView::CreateExtraTitleRowButtons() {}
 
 void TrayDetailsView::TransitionToDefaultView() {
   // Cache pointer to owner in this function scope. TrayDetailsView will be
   // deleted after called ShowDefaultView.
   SystemTrayItem* owner = owner_;
   if (UseMd()) {
     if (back_button_ && back_button_->HasFocus())
       owner->set_restore_focus(true);
@@ skipping 49 matching lines @@
     if (index < child_count() - 1 && child_at(index + 1) != title_row_)
       scroll_border_->set_visible(true);
     else
       scroll_border_->set_visible(false);
   }
 
   views::View::OnPaintBorder(canvas);
 }
 
 }  // namespace ash