Only execute default actions on trusted events.

LayoutTests/fast/events/frame-tab-focus.html

Index: LayoutTests/fast/events/frame-tab-focus.html
diff --git a/LayoutTests/fast/events/frame-tab-focus.html b/LayoutTests/fast/events/frame-tab-focus.html
index 9fc74636c39363875c9aa7c4b97e7dd8a607457a..906b897c51f827af9255a946d3a4c2015f31c4be 100644
--- a/LayoutTests/fast/events/frame-tab-focus.html
+++ b/LayoutTests/fast/events/frame-tab-focus.html
@@ -86,10 +86,14 @@ function setupWindow(win)
 
 function dispatchTabPress(element, shiftKey, altKey)
 {
-    var event = document.createEvent('KeyboardEvents');
-    var tabKeyIdentifier = 'U+0009';
-    event.initKeyboardEvent('keydown', true, true, document.defaultView, tabKeyIdentifier, 0, false, altKey, shiftKey, false, false);
-    element.dispatchEvent(event);
+    if (window.testRunner) {
+        modifiers = [];
+        if (shiftKey)
+            modifiers[0] = "shiftKey";

[tkent, 2015/07/22 23:15:03]

modifieers.push("shiftKey")  would be simpler.

[dtapuska, 2015/07/23 01:28:10]

Done.

+        if (altKey)
+            modifiers[modifiers.length] = "altKey";

[tkent, 2015/07/22 23:15:03]

modifiers.push("altKey") is simpler.

[dtapuska, 2015/07/23 01:28:10]

Done.

+        eventSender.keyDown('\u0009', modifiers);
+    }
 }
 
 function test()