Remove non-standardize key code names from event_sender.

third_party/WebKit/LayoutTests/editing/input/resources/reveal-utilities.js

 function offsetFromViewportTop(element)
 {
     return element.getClientRects()[0].top;
 }
 
 function offsetOfMiddleFromViewportTop(element)
 {
     return element.getClientRects()[0].top + Math.round(element.getClientRects()[0].height / 2);
 }
 
@@ skipping 26 matching lines @@
          "PASS" :
          "FAIL<br>viewportMiddle: " + viewportMiddle + ", offsetOfInput: " + offsetOfInput);
 }
 
 function performVerticalScrollingTest()
 {
     var initialOffset = offsetFromViewportTop(document.body.children[0]);
     document.getElementById("input").focus();
     if (window.eventSender) {
         while (offsetFromViewportTop(document.body.children[0]) < initialOffset)
-            eventSender.keyDown("pageUp");
+            eventSender.keyDown("PageUp");
         return true;
     }
     return false;
 }
 
 function performVerticalScrollingInputTest()
 {
     if (performVerticalScrollingTest())
         eventSender.keyDown("a");
 }
@@ skipping 23 matching lines @@
                 jumpDetected = true;
                 break;
             }
         }
         if (!jumpDetected)
             document.write("PASS");
         else
             document.write("FAIL<br>Jump scroll from " + previousScrollTop + " to " + currentScrollTop);
     }
 }