It seems GAIA had changed dosserver rules today, so we can go back to accounts.google.com.

chrome/common/url_constants.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 "chrome/common/url_constants.h"
 
 #include "googleurl/src/url_util.h"
 
 namespace chrome {
 
@@ skipping 388 matching lines @@
 #if defined(OS_CHROMEOS)
     "https://support.google.com/chromeos/?p=settings_encryption";
 #else
     "https://support.google.com/chrome/?p=settings_encryption";
 #endif
 
 const char kSyncErrorsHelpURL[] =
     "https://support.google.com/chrome/?p=settings_sync_error";
 
 const char kSyncCreateNewAccountURL[] =
-    "https://www.google.com/accounts/NewAccount?service=chromiumsync";
+    "https://accounts.google.com/NewAccount?service=chromiumsync";
 
 #if defined(OS_CHROMEOS)
 const char kNaturalScrollHelpURL[] =
     "https://support.google.com/chromeos/?p=simple_scrolling";
 #endif
 
 
 const char* const kChromeDebugURLs[] = {
   kChromeUICrashURL,
   kChromeUIKillURL,
   kChromeUIHangURL,
   kChromeUIShorthangURL,
   kChromeUIGpuCleanURL,
   kChromeUIGpuCrashURL,
   kChromeUIGpuHangURL,
 };
 int kNumberOfChromeDebugURLs = static_cast<int>(arraysize(kChromeDebugURLs));
 
 const char kExtensionScheme[] = "chrome-extension";
 const char kExtensionResourceScheme[] = "chrome-extension-resource";
 
 }  // namespace chrome