Remove KeyboardEvent.altGraphKey

LayoutTests/fast/forms/tabs-with-modifiers.html

 <p>This test tabs with different combinations of modifiers pressed, where some should advance focus and some should not.</p>
 <div id="testDiv"></div>
 <pre id="console"></pre>
 
 <script>
 
 if (window.testRunner)
     testRunner.dumpAsText();
 
 function log(s)
@@ skipping 40 matching lines @@
     input = parentElement.ownerDocument.createElement('input');
     addEventListeners(input);
     input.setAttribute("id", "b");
     parentElement.appendChild(input);
     input = parentElement.ownerDocument.createElement('input');
     addEventListeners(input);
     input.setAttribute("id", "c");
     parentElement.appendChild(input);
 }
 
-function dispatchTab(element, shiftKey, metaKey, ctrlKey, altGraphKey)
+function dispatchTab(element, shiftKey, metaKey, ctrlKey)
 {
     var event = document.createEvent("KeyboardEvents");
     var tabKeyIdentifier = "U+0009";
-    event.initKeyboardEvent("keydown", true, true, document.defaultView, tabKeyIdentifier, 0, ctrlKey, false, shiftKey, metaKey, altGraphKey);
+    event.initKeyboardEvent("keydown", true, true, document.defaultView, tabKeyIdentifier, 0, ctrlKey, false, shiftKey, metaKey);
     element.dispatchEvent(event);
 }
 
 function setup()
 {
     var testDiv = document.getElementById('testDiv');
     addElements(testDiv);
 }
 
 setup();
 
 var middleInput = document.getElementsByTagName('input')[1];
 
 for (i = 0; i < 2; ++i) {
     log("resetting focus to middle input\n");
     middleInput.focus();
     log("test tab case that should advance focus\n");
-    dispatchTab(middleInput, (i & 1) != 0, false, false, false);
+    dispatchTab(middleInput, (i & 1) != 0, false, false);
 }
-for (i = 2; i < 16; ++i) {
+for (i = 2; i < 8; ++i) {
     log("resetting focus to middle input\n");
     middleInput.focus();
     log("test tab case that should not advance focus\n");
-    dispatchTab(middleInput, (i & 1) != 0, (i & 2) != 0, (i & 4) != 0, (i & 8) != 0);
+    dispatchTab(middleInput, (i & 1) != 0, (i & 2) != 0, (i & 4) != 0);
 }
 
 </script>