Update references to the extension messaging APIs to point to the "runtime"

chrome/test/data/extensions/api_test/tabs/connect/echo.js

Index: chrome/test/data/extensions/api_test/tabs/connect/echo.js
diff --git a/chrome/test/data/extensions/api_test/tabs/connect/echo.js b/chrome/test/data/extensions/api_test/tabs/connect/echo.js
index 1cab30cd38db8115ef8be5356434a1c41849c576..ae24e7dee5c78afdf6eacc45d84ddc635be16ca7 100644
--- a/chrome/test/data/extensions/api_test/tabs/connect/echo.js
+++ b/chrome/test/data/extensions/api_test/tabs/connect/echo.js
@@ -2,7 +2,7 @@
 // Posting a message with "GET" returns the name and # of connections opened.
 var connections = 0;
 
-chrome.extension.onConnect.addListener(function onConnect(port) {
+chrome.runtime.onConnect.addListener(function onConnect(port) {
   connections++;
   port.onMessage.addListener(function onMessage(msg) {
     if (msg == "GET") {