ash: Fix use of uninitialized member in initializer list

ash/system/user/tray_user.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/system/user/tray_user.h"
 
 #include <algorithm>
 #include <climits>
 #include <vector>
 
@@ skipping 1034 matching lines @@
 }
 
 bool UserView::SupportsMultiProfile() {
   // We do not want to see any multi profile additions to a user view when the
   // log in screen is shown.
   return Shell::GetInstance()->delegate()->IsMultiProfilesEnabled() &&
       !Shell::GetInstance()->session_state_delegate()->IsUserSessionBlocked();
 }
 
 AddUserView::AddUserView(UserCard* owner, views::ButtonListener* listener)
-    : CustomButton(listener_),
+    : CustomButton(listener),
       add_user_(NULL),
       listener_(listener),
       owner_(owner),
       anchor_(NULL) {
   AddContent();
   owner_->ForceBorderVisible(true);
 }
 
 AddUserView::~AddUserView() {
   owner_->ForceBorderVisible(false);
@@ skipping 352 matching lines @@
       internal::GetRootWindowController(
           system_tray()->GetWidget()->GetNativeWindow()->GetRootWindow());
   if (controller && controller->shelf()) {
     UpdateAfterShelfAlignmentChange(
         controller->GetShelfLayoutManager()->GetAlignment());
   }
 }
 
 }  // namespace internal
 }  // namespace ash