Refactor extension event distribution to use Values instead of JSON strings.

chrome/renderer/resources/extensions/event.js

Index: chrome/renderer/resources/extensions/event.js
diff --git a/chrome/renderer/resources/extensions/event.js b/chrome/renderer/resources/extensions/event.js
index a6d636342eea978f3568208f7345f8b763559306..397ebc3b4e03dedf1d4d7ed064ee46643fa245e8 100644
--- a/chrome/renderer/resources/extensions/event.js
+++ b/chrome/renderer/resources/extensions/event.js
@@ -133,18 +133,11 @@
     eventArgumentMassagers[name] = fn;
   };
 
-  // Dispatches a named event with the given JSON array, which is deserialized
-  // before dispatch. The JSON array is the list of arguments that will be
-  // sent with the event callback.
-  chromeHidden.Event.dispatchJSON = function(name, args) {
+  // Dispatches a named event with the given argument array. The args array is
+  // the list of arguments that will be sent to the event callback.
+  chromeHidden.Event.dispatch = function(name, args) {
     if (attachedNamedEvents[name]) {
       if (args) {
-        // TODO(asargent): This is an antiquity. Until all callers of
-        // dispatchJSON use actual values, this must remain here to catch the
-        // cases where a caller has hard-coded a JSON string to pass in.
-        if (typeof(args) == "string") {
-          args = chromeHidden.JSON.parse(args);
-        }
         if (eventArgumentMassagers[name])
           eventArgumentMassagers[name](args);
       }