Expose enums to extension bindings.

chrome/renderer/resources/extensions/binding.js

Index: chrome/renderer/resources/extensions/binding.js
diff --git a/chrome/renderer/resources/extensions/binding.js b/chrome/renderer/resources/extensions/binding.js
index 4bb9b99bfbdece26a428b09c1b9b5ed391275adb..7e6996f7f2d138c671ae176c74929f6f7ac258f2 100644
--- a/chrome/renderer/resources/extensions/binding.js
+++ b/chrome/renderer/resources/extensions/binding.js
@@ -243,13 +243,29 @@ Binding.prototype = {
       mod = mod[name];
     }
 
-    // Add types to global schemaValidator, the types we depend on from other
-    // namespaces will be added as needed.
     if (schema.types) {
       $Array.forEach(schema.types, function(t) {
         if (!isSchemaNodeSupported(t, platform, manifestVersion))
           return;
+
+        // Add types to global schemaValidator, the types we depend on from
+        // other namespaces will be added as needed.
         schemaUtils.schemaValidator.addTypes(t);
+
+        // Generate symbols for enums.
+        var enumValues = t['enum'];
+        if (enumValues) {
+          // Type IDs are qualified with the namespace during compilation,
+          // unfortunately, so remove it here.
+          var namespaceAndId = $String.split(t.id, '.');
+          logging.DCHECK(namespaceAndId.length == 2, t.id);
+          logging.DCHECK(namespaceAndId[0] == schema.namespace, t.id);
+          var id = namespaceAndId[1];
+          mod[id] = {};
+          $Array.forEach(enumValues, function(enumValue) {
+            mod[id][enumValue] = enumValue;
+          });
+        }
       }, this);
     }