[Extensions] Generate all schema resources

chrome/common/extensions/api/tts_engine.json

Index: chrome/common/extensions/api/tts_engine.json
diff --git a/chrome/common/extensions/api/tts_engine.json b/chrome/common/extensions/api/tts_engine.json
index 7f0e24eae7a725d10f87d88c646146130c03baa1..ed5b64ffb1af909e9eb8df86e48b77d6d69bc193 100644
--- a/chrome/common/extensions/api/tts_engine.json
+++ b/chrome/common/extensions/api/tts_engine.json
@@ -6,6 +6,13 @@
   {
     "namespace": "ttsEngine",
     "description": "Use the <code>chrome.ttsEngine</code> API to implement a text-to-speech(TTS) engine using an extension. If your extension registers using this API, it will receive events containing an utterance to be spoken and other parameters when any extension or Chrome App uses the <a href='tts'>tts</a> API to generate speech. Your extension can then use any available web technology to synthesize and output the speech, and send events back to the calling function to report the status.",
+    "types": [
+      {
+        "id": "VoiceGender",
+        "type": "string",
+        "enum": ["male", "female"]
+      }
+    ],
     "functions": [
       {
         "name": "sendTtsEvent",
@@ -52,10 +59,9 @@
                 "description": "The language to be used for synthesis, in the form <em>language</em>-<em>region</em>. Examples: 'en', 'en-US', 'en-GB', 'zh-CN'."
               },
               "gender": {
-                "type": "string",
+                "$ref": "VoiceGender",
                 "optional": true,
-                "description": "Gender of voice for synthesized speech.",
-                "enum": ["male", "female"]
+                "description": "Gender of voice for synthesized speech."
               },
               "rate": {
                 "type": "number",