Lazy load chrome.* APIs

chrome/renderer/resources/extensions/tts_engine_custom_bindings.js

Index: chrome/renderer/resources/extensions/tts_engine_custom_bindings.js
diff --git a/chrome/renderer/resources/extensions/tts_engine_custom_bindings.js b/chrome/renderer/resources/extensions/tts_engine_custom_bindings.js
index f16f1438e1a7491a3be40a4b22ac7bd902b77c79..1d19ceaddbd53345db64697aeb20c23467e3d80d 100644
--- a/chrome/renderer/resources/extensions/tts_engine_custom_bindings.js
+++ b/chrome/renderer/resources/extensions/tts_engine_custom_bindings.js
@@ -2,7 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Custom bindings for the ttsEngine API.
+// Custom binding for the ttsEngine API.
+
+var binding = require('binding').Binding.create('ttsEngine');
 
 var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 
@@ -16,3 +18,5 @@ chromeHidden.Event.registerArgumentMassager('ttsEngine.onSpeak',
   };
   dispatch([text, options, sendTtsEvent]);
 });
+
+exports.binding = binding.generate();