Remove non-standardize key code names from event_sender.

third_party/WebKit/LayoutTests/fast/forms/resources/common.js

 function $(id) {
     return document.getElementById(id);
 }
 
 function createFormControlDataSet() {
     // A list of labelable elements resides in http://www.whatwg.org/specs/web-apps/current-work/multipage/forms.html#category-label
     var formControlClassNames = [
         'HTMLButtonElement',
         'HTMLDataListElement',
         'HTMLFieldSetElement',
@@ skipping 203 matching lines @@
         if (loaded)
             callback();
     }, false);
 }
 
 function sendString(str) {
     if (!window.eventSender) {
         console.log('Require eventSender.');
         return;
     }
-    for (var i = 0; i < str.length; ++i)
-        eventSender.keyDown(str.charAt(i));
+    for (var i = 0; i < str.length; ++i) {
+        var key = str.charAt(i);
+        if (key == '\n')
+            key = 'Enter';
+        eventSender.keyDown(key);
+    }
 }