Add the "options_ui" extension manifest field.

extensions/common/manifest_constants.h

Index: extensions/common/manifest_constants.h
diff --git a/extensions/common/manifest_constants.h b/extensions/common/manifest_constants.h
index 0713909af64b00c93f7af692295eaae61ca0c71c..032865dee99bf39396c23fdd0a778e0f19d0bc34 100644
--- a/extensions/common/manifest_constants.h
+++ b/extensions/common/manifest_constants.h
@@ -104,6 +104,7 @@ extern const char kOmnibox[];
 extern const char kOmniboxKeyword[];
 extern const char kOptionalPermissions[];
 extern const char kOptionsPage[];
+extern const char kOptionsUI[];
 extern const char kOverrideHomepage[];
 extern const char kOverrideSearchProvider[];
 extern const char kOverrideStartupPage[];
@@ -377,6 +378,11 @@ extern const char kInvalidOAuth2ClientId[];
 extern const char kInvalidOAuth2Scopes[];
 extern const char kInvalidOfflineEnabled[];
 extern const char kInvalidOmniboxKeyword[];
+extern const char kInvalidOptionsUIChromeStyle[];
+extern const char kInvalidOptionsUIOpenInTab[];
+extern const char kInvalidOptionsUIPage[];
+extern const char kInvalidOptionsUIPageExpectUrlInPackage[];
+extern const char kInvalidOptionsUIPageInHostedApp[];
 extern const char kInvalidOptionsPage[];
 extern const char kInvalidOptionsPageExpectUrlInPackage[];
 extern const char kInvalidOptionsPageInHostedApp[];