Add the "options_ui" extension manifest field.

extensions/common/api/extensions_manifest_types.json

Index: extensions/common/api/extensions_manifest_types.json
diff --git a/extensions/common/api/extensions_manifest_types.json b/extensions/common/api/extensions_manifest_types.json
index 00262692a85139b6418daa80713e063f616acf29..af0b368c266327cc6fb4ae7bb670427bccfa3d7d 100644
--- a/extensions/common/api/extensions_manifest_types.json
+++ b/extensions/common/api/extensions_manifest_types.json
@@ -39,6 +39,28 @@
         }
       },
       {
+        "id": "OptionsUI",
+        "type": "object",
+        "description": "The <code>options_ui</code> manifest property declares how the options page should be displayed.",
+        "properties": {
+          "page": {
+            "description": "<p>The path to your options page.</p>",

[not at google - send to devlin, 2014/08/29 05:39:24]

No need for the surrounding <p>, we can do that ourselves. Same elsewhere. You
only need the <p>s if you have multiple paragraphs.

[ericzeng, 2014/08/29 22:08:50]

Done.

+            "optional": false,

[not at google - send to devlin, 2014/08/29 05:39:24]

"optional" is false by default.

[ericzeng, 2014/08/29 22:08:50]

Done.

+            "type": "string"
+          },
+          "chrome_style": {
+            "description": "<p>If <code>true</code>, a Chrome user agent stylesheet will be applied to your options page. The default value is <code>false</code>.</p>",
+            "optional": true,
+            "type": "boolean"
+          },
+          "open_in_tab": {
+            "description": "<p>If <code>true</code>, the options page will be opened in a new tab instead of in an embedded popup in chrome://extensions. The default value is <code>false</code.</p>",

[not at google - send to devlin, 2014/08/29 05:39:24]

</code> not </code

[ericzeng, 2014/08/29 22:08:50]

Done.

+            "optional": true,
+            "type": "boolean"
+          }
+        }
+      },
+      {
         "id": "SocketHostPatterns",
         "description": "<p>A single string or a list of strings representing host:port patterns.</p>",
         "choices": [