Fix tests to avoid page scale reset when setting page scale.

LayoutTests/fast/events/script-tests/page-scaled-mouse-click.js

Index: LayoutTests/fast/events/script-tests/page-scaled-mouse-click.js
diff --git a/LayoutTests/fast/events/script-tests/page-scaled-mouse-click.js b/LayoutTests/fast/events/script-tests/page-scaled-mouse-click.js
index 0d80b73b8e45694921874ad632d507e719c1125c..89fa4943d36decd19bf19b14026370b4b35032fb 100644
--- a/LayoutTests/fast/events/script-tests/page-scaled-mouse-click.js
+++ b/LayoutTests/fast/events/script-tests/page-scaled-mouse-click.js
@@ -43,13 +43,13 @@ function testEvents(button, description, expectedString) {
     clearEventLog();
 }
 
-if (window.eventSender && window.internals) {
+if (window.eventSender) {
     eventSender.mouseMoveTo(10, 10);
     // We are clicking in the same position on screen. As we scale or transform the page,
     // we expect the pageX and pageY event coordinates to change because different
     // parts of the document are under the mouse.
     testEvents(0, "Unscaled", "click(10, 10)");
 
-    window.internals.setPageScaleFactor(0.5, 0, 0);
+    window.eventSender.setPageScaleFactor(0.5, 0, 0);
     testEvents(0, "setPageScale(0.5)", "click(20, 20)");
 }