Redirect chrome://welcome to the new tab page.

chrome/common/url_constants.h

 // 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.
 
 // Contains constants for known URLs and portions thereof.
 
 #ifndef CHROME_COMMON_URL_CONSTANTS_H_
 #define CHROME_COMMON_URL_CONSTANTS_H_
 
 #include <string>
@@ skipping 237 matching lines @@
 extern const char kChromeUIWebRTCDeviceProviderHost[];
 extern const char kChromeUIWorkersHost[];
 
 extern const char kChromeUIScreenshotPath[];
 extern const char kChromeUIThemePath[];
 
 #if defined(ENABLE_PRINT_PREVIEW)
 extern const char kChromeUIPrintHost[];
 #endif  // ENABLE_PRINT_PREVIEW
 
-#if defined(OS_ANDROID)
-extern const char kChromeUIWelcomeHost[];
-#endif
-
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 extern const char kChromeUILinuxProxyConfigHost[];
 extern const char kChromeUISandboxHost[];
 #endif
 
 #if defined(OS_CHROMEOS)
 extern const char kChromeUIActivationMessageHost[];
 extern const char kChromeUIAppLaunchHost[];
 extern const char kChromeUIBluetoothPairingHost[];
 extern const char kChromeUICertificateManagerHost[];
@@ skipping 283 matching lines @@
 // The URL for the 32-bit Mac deprecation help center article
 extern const char kMac32BitDeprecationURL[];
 #endif
 
 // The URL for the "Learn more" link the the Easy Unlock settings.
 extern const char kEasyUnlockLearnMoreUrl[];
 
 }  // namespace chrome
 
 #endif  // CHROME_COMMON_URL_CONSTANTS_H_