Allow FTP requests by Chromium extensions

chrome/test/data/extensions/api_test/cross_origin_xhr/content_script/content_script.js

Index: chrome/test/data/extensions/api_test/cross_origin_xhr/content_script/content_script.js
diff --git a/chrome/test/data/extensions/api_test/cross_origin_xhr/content_script/content_script.js b/chrome/test/data/extensions/api_test/cross_origin_xhr/content_script/content_script.js
index c30c8dddf9ab45569b8f28afd44688350e07913a..c46805a2a4e2b5f2ce91539613a23de79aabe6cd 100644
--- a/chrome/test/data/extensions/api_test/cross_origin_xhr/content_script/content_script.js
+++ b/chrome/test/data/extensions/api_test/cross_origin_xhr/content_script/content_script.js
@@ -4,6 +4,7 @@
 
 chrome.extension.onRequest.addListener(
   function(url, sender, sendResponse) {
+    var isErrorTriggered = false;
     var req = new XMLHttpRequest();
     console.log('Requesting url: ' + url);
     req.open('GET', url, true);
@@ -16,6 +17,7 @@ chrome.extension.onRequest.addListener(
       });
     };
     req.onerror = function() {
+      isErrorTriggered = true;
       sendResponse({
         'event': 'error',
         'status': req.status,
@@ -23,7 +25,22 @@ chrome.extension.onRequest.addListener(
       });
     };
 
-    req.send(null);
+    try {
+      req.send(null);
+    } catch (e) {
+      if (/^https?:/i.test(url)) {
+        sendResponse({
+          'thrownError': 'req.send() has thrown an error for ' + url + ': ' + e
+        });
+      } else if (!isErrorTriggered) {
+        // A NetworkError will synchronously be be thrown whenever a
+        // FTP request fails. This should be handled by req.onerror.
+        sendResponse({
+          'thrownError': 'req.send() has thrown an error without dispatching ' +
+                         'the req.onerror event for ' + url + ': ' + e
+        });
+      }
+    }
   });
 
 chrome.extension.sendRequest('injected');