Deprecate chrome.extension.sendRequest in favor of sendMessage, with a safer

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 c8a05cff7005e1ed2241a089adfaa86772231dd3..27ad2ec99f06ec241eb05fe3b075a9d0128179d6 100644
--- a/chrome/renderer/resources/extensions/event.js
+++ b/chrome/renderer/resources/extensions/event.js
@@ -195,14 +195,19 @@
     if (validationErrors) {
       return validationErrors;
     }
+    var retvals = [];
     for (var i = 0; i < this.listeners_.length; i++) {
       try {
-        this.listeners_[i].apply(null, args);
+        var retval = this.listeners_[i].apply(null, args);
+        if (retval !== undefined)
+          retvals.push(retval);
       } catch (e) {
         console.error("Error in event handler for '" + this.eventName_ +
                       "': " + e.stack);
       }
     }
+    if (retvals.length)
+      return retvals;
   };
 
   // Attaches this event object to its name.  Only one object can have a given