Notify user that Chrome is already synced if promo banner "sync me" link is c...

chrome/browser/dom_ui/new_tab_page_sync_handler.cc

 // Copyright (c) 2006-2008 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/dom_ui/new_tab_page_sync_handler.h"
 
 #include "app/l10n_util.h"
 #include "base/string_util.h"
+#include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/renderer_host/render_view_host.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/pref_service.h"
 #include "grit/browser_resources.h"
 #include "grit/generated_resources.h"
 #include "net/base/cookie_monster.h"
@@ skipping 122 matching lines @@
   sync_ui_util::MessageType type =
       sync_ui_util::GetStatusLabels(sync_service_, &status_msg, &link_text);
   SendSyncMessageToPage(FromSyncStatusMessageType(type),
                         UTF16ToUTF8(status_msg), UTF16ToUTF8(link_text));
 }
 
 void NewTabPageSyncHandler::HandleSyncLinkClicked(const Value* value) {
   DCHECK(!waiting_for_initial_page_load_);
   DCHECK(sync_service_);
   if (sync_service_->HasSyncSetupCompleted()) {
-    // User clicked the 'Login again' link to re-authenticate.
-    sync_service_->ShowLoginDialog();
+    DictionaryValue value;
+    value.SetString(L"syncEnabledMessage",
+        l10n_util::GetStringF(IDS_SYNC_NTP_SYNCED_TO,
+            UTF16ToWide(sync_service_->GetAuthenticatedUsername())));
+    dom_ui_->CallJavascriptFunction(L"syncAlreadyEnabled", value);
   } else {
     // User clicked the 'Start now' link to begin syncing.
     ProfileSyncService::SyncEvent(ProfileSyncService::START_FROM_NTP);
     sync_service_->EnableForUser();
   }
 }
 
 void NewTabPageSyncHandler::OnStateChanged() {
   // Don't do anything if the page has not yet loaded.
   if (waiting_for_initial_page_load_)
@@ skipping 47 matching lines @@
       if (linkurl.empty()) {
         value.SetBoolean(L"linkurlisset", false);
       } else {
         value.SetBoolean(L"linkurlisset", true);
         value.SetString(L"linkurl", linkurl);
       }
     }
   }
   dom_ui_->CallJavascriptFunction(L"syncMessageChanged", value);
 }