Increase the delay in WebNavigationEvents test from 500ms to 1s.

chrome/test/data/extensions/api_test/webnavigation/navigation/test.html

Index: chrome/test/data/extensions/api_test/webnavigation/navigation/test.html
diff --git a/chrome/test/data/extensions/api_test/webnavigation/navigation/test.html b/chrome/test/data/extensions/api_test/webnavigation/navigation/test.html
index 4ac358d1dbf7515032261a838c16ed68692946a1..368ed153f519ee1cf56dc691c0d8db00ade8467a 100644
--- a/chrome/test/data/extensions/api_test/webnavigation/navigation/test.html
+++ b/chrome/test/data/extensions/api_test/webnavigation/navigation/test.html
@@ -45,7 +45,7 @@ chrome.tabs.getSelected(null, function(tab) {
         },
 
         /* Navigates to a.html that redirects to b.html (using javascript)
-           after a delay of 500ms, so the initial navigation is completed and
+           after a delay of 1s, so the initial navigation is completed and
            the redirection is marked as client_redirect */
         function clientRedirect() {
           expect([