[cros] Display emails of users are stored in a separate dictionary in Local State.

chrome/browser/chromeos/login/user.cc

 // Copyright (c) 2011 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 "chrome/browser/chromeos/login/user.h"
 
 #include "base/stringprintf.h"
 #include "chrome/browser/chromeos/login/default_user_images.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "ui/base/resource/resource_bundle.h"
 
 namespace chromeos {
 
 User::User(const std::string& email)
     : email_(email),
+      display_email_(email),
       oauth_token_status_(OAUTH_TOKEN_STATUS_UNKNOWN),
       image_index_(kInvalidImageIndex) {
   image_ = *ResourceBundle::GetSharedInstance().GetBitmapNamed(
       kDefaultImageResources[0]);
 }
 
 User::~User() {}
 
 void User::SetImage(const SkBitmap& image, int image_index) {
   image_ = image;
   image_index_ = image_index;
 }
 
 std::string User::GetDisplayName() const {
-  size_t i = email_.find('@');
+  size_t i = display_email_.find('@');
   if (i == 0 || i == std::string::npos) {
-    return email_;
+    return display_email_;
   }
-  return email_.substr(0, i);
+  return display_email_.substr(0, i);
 }
 
 bool User::NeedsNameTooltip() const {
-  return UserManager::Get()->IsDisplayNameUnique(GetDisplayName());
+  return !UserManager::Get()->IsDisplayNameUnique(GetDisplayName());
 }
 
 std::string User::GetNameTooltip() const {
-  const std::string& user_email = email();
+  const std::string& user_email = display_email_;
   size_t at_pos = user_email.rfind('@');
   if (at_pos == std::string::npos) {
     NOTREACHED();
     return std::string();
   }
   size_t domain_start = at_pos + 1;
   std::string domain = user_email.substr(domain_start,
                                          user_email.length() - domain_start);
   return base::StringPrintf("%s (%s)",
                             GetDisplayName().c_str(),
                             domain.c_str());
 }
 
 }  // namespace chromeos