[Signin Error Dialog] (2/3) Added handlers and UI constructors

chrome/common/url_constants.cc

Index: chrome/common/url_constants.cc
diff --git a/chrome/common/url_constants.cc b/chrome/common/url_constants.cc
index 367714bbd92aac65141759ea60eda2f10a0a1677..cbb7771abf34b927b70c3ce25579a0c9fee9fd79 100644
--- a/chrome/common/url_constants.cc
+++ b/chrome/common/url_constants.cc
@@ -82,6 +82,7 @@ const char kChromeUIRestartURL[] = "chrome://restart/";
 const char kChromeUISettingsURL[] = "chrome://settings/";
 const char kChromeUIContentSettingsURL[] = "chrome://settings/content";
 const char kChromeUISettingsFrameURL[] = "chrome://settings-frame/";
+const char kChromeUISigninErrorURL[] = "chrome://signin-error/";
 const char kChromeUISuggestionsURL[] = "chrome://suggestions/";
 const char kChromeUISupervisedUserPassphrasePageURL[] =
     "chrome://managed-user-passphrase/";
@@ -229,6 +230,7 @@ const char kChromeUIRestartHost[] = "restart";
 const char kChromeUISettingsHost[] = "settings";
 const char kChromeUISettingsFrameHost[] = "settings-frame";
 const char kChromeUIShorthangHost[] = "shorthang";
+const char kChromeUISigninErrorHost[] = "signin-error";
 const char kChromeUISignInInternalsHost[] = "signin-internals";
 const char kChromeUISiteEngagementHost[] = "site-engagement";
 const char kChromeUISuggestionsHost[] = "suggestions";