Omitted adding the Cloud Print component app on Chrome OS.

chrome/browser/extensions/extension_chrome_auth_private_api.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/extensions/extension_chrome_auth_private_api.h"
 
 #include <string>
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service.h"
 #include "chrome/browser/profiles/profile.h"
 
 namespace {
 
 bool IsCloudPrintEnableURL(Profile* profile, const GURL& url) {
   ExtensionService* service = profile->GetExtensionService();
   const Extension* cloud_print_app = service->GetExtensionById(
       extension_misc::kCloudPrintAppId, false);
   if (!cloud_print_app) {
+#if !defined(OS_CHROMEOS)
     NOTREACHED();
+#endif  // !defined(OS_CHROMEOS)
     return false;
   }
   return (service->GetExtensionByWebExtent(url) == cloud_print_app);
 }
 
 bool test_mode = false;
 
 const char kAccessDeniedError[] =
     "Cannot call this API from a non-cloudprint URL.";
 }  // namespace
@@ skipping 27 matching lines @@
         credentials, robot_email, user_email);
   }
   SendResponse(true);
   return true;
 }
 
 // static
 void SetCloudPrintCredentialsFunction::SetTestMode(bool test_mode_enabled) {
   test_mode = test_mode_enabled;
 }