Add sign in dialog for GCP->print preview integration.

chrome/common/pref_names.h

 // 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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 #pragma once
 
@@ skipping 462 matching lines @@
 extern const char kGeolocationAccessToken[];
 extern const char kGeolocationDefaultContentSetting[];
 extern const char kGeolocationContentSettings[];
 
 extern const char kLoginDatabaseMigrated[];
 
 extern const char kRemoteAccessClientFirewallTraversal[];
 extern const char kRemoteAccessHostFirewallTraversal[];
 
 extern const char kCloudPrintServiceURL[];
+extern const char kCloudPrintSigninURL[];
 extern const char kCloudPrintDialogWidth[];
 extern const char kCloudPrintDialogHeight[];
+extern const char kCloudPrintSigninDialogWidth[];
+extern const char kCloudPrintSigninDialogHeight[];
 extern const char kCloudPrintProxyEnabled[];
 extern const char kCloudPrintProxyId[];
 extern const char kCloudPrintAuthToken[];
 extern const char kCloudPrintXMPPAuthToken[];
 extern const char kCloudPrintEmail[];
 extern const char kCloudPrintPrintSystemSettings[];
 extern const char kCloudPrintEnableJobPoll[];
 extern const char kCloudPrintRobotRefreshToken[];
 extern const char kCloudPrintRobotEmail[];
 extern const char kVirtualPrinterDriverEnabled[];
@@ skipping 48 matching lines @@
 
 extern const char kUserCreatedLoginItem[];
 extern const char kBackgroundModeEnabled[];
 
 extern const char kDevicePolicyRefreshRate[];
 extern const char kUserPolicyRefreshRate[];
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_