Check for warnings when loading extensions in browser tests.

chrome/test/data/extensions/api_test/webnavigation/test_failures.js

Index: chrome/test/data/extensions/api_test/webnavigation/test_failures.js
diff --git a/chrome/test/data/extensions/api_test/webnavigation/test_failures.js b/chrome/test/data/extensions/api_test/webnavigation/test_failures.js
index 357b1490d26a9edd883f75d26b4253128e0b2347..4b33bd8a41dd896ed6cb2a77381b2444cccf8960 100644
--- a/chrome/test/data/extensions/api_test/webnavigation/test_failures.js
+++ b/chrome/test/data/extensions/api_test/webnavigation/test_failures.js
@@ -2,36 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-function runTests() {
+onload = function() {
   var getURL = chrome.extension.getURL;
   chrome.tabs.create({"url": "about:blank"}, function(tab) {
     var tabId = tab.id;
 
     chrome.test.runTests([
-      // Navigates to a non-existant page.
-      function nonExistant() {
-        expect([
-          { label: "onBeforeNavigate",
-            event: "onBeforeNavigate",
-            details: { frameId: 0,
-                       processId: 0,
-                       tabId: 0,
-                       timeStamp: 0,
-                       url: getURL('failures/nonexistant.html') }},
-          { label: "onErrorOccurred",
-            event: "onErrorOccurred",
-            details: { error: "net::ERR_FILE_NOT_FOUND",
-                       frameId: 0,
-                       processId: 0,
-                       tabId: 0,
-                       timeStamp: 0,
-                       url: getURL('failures/nonexistant.html') }}],
-          [["onBeforeNavigate", "onErrorOccurred"]]);
-        chrome.tabs.update(tabId, { url: getURL('failures/nonexistant.html') });
-      },
-
-      // An page that tries to load an non-existant iframe.
-      function nonExistantIframe() {
+      // An page that tries to load an non-existent iframe.
+      function nonExistentIframe() {
         expect([
           { label: "a-onBeforeNavigate",
             event: "onBeforeNavigate",
@@ -84,8 +62,8 @@ function runTests() {
         chrome.tabs.update(tabId, { url: getURL('failures/d.html') });
       },
 
-      // An iframe navigates to a non-existant page.
-      function nonExistantIframeNavigation() {
+      // An iframe navigates to a non-existent page.
+      function nonExistentIframeNavigation() {
         expect([
           { label: "a-onBeforeNavigate",
             event: "onBeforeNavigate",
@@ -208,6 +186,32 @@ function runTests() {
             "onErrorOccurred"]]);
         chrome.tabs.update(tabId, { url: getURL('failures/e.html') });
       },
+
+      // Navigates to a non-existent page (this test case must be last,
+      // otherwise the non-existant URL breaks tests that follow, since loading
+      // those test pages is seen as a non-extension -> extension URL
+      // transition, which is forbidden by web_accessible_resources enforcement
+      // in manifest version 2.)
+      function nonExistent() {
+        expect([
+          { label: "onBeforeNavigate",
+            event: "onBeforeNavigate",
+            details: { frameId: 0,
+                       processId: 0,
+                       tabId: 0,
+                       timeStamp: 0,
+                       url: getURL('failures/nonexistent.html') }},
+          { label: "onErrorOccurred",
+            event: "onErrorOccurred",
+            details: { error: "net::ERR_FILE_NOT_FOUND",
+                       frameId: 0,
+                       processId: 0,
+                       tabId: 0,
+                       timeStamp: 0,
+                       url: getURL('failures/nonexistent.html') }}],
+          [["onBeforeNavigate", "onErrorOccurred"]]);
+        chrome.tabs.update(tabId, { url: getURL('failures/nonexistent.html') });
+      },
     ]);
   });
-}
+};