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

LayoutTests/fast/frames/frame-set-rotation-hit.html

Index: LayoutTests/fast/frames/frame-set-rotation-hit.html
diff --git a/LayoutTests/fast/frames/frame-set-rotation-hit.html b/LayoutTests/fast/frames/frame-set-rotation-hit.html
index 548a1d376a5572e1b3f6621f1dd459c2c6423d84..af17aaad949923413e31184d5e0d4b102b3516b0 100644
--- a/LayoutTests/fast/frames/frame-set-rotation-hit.html
+++ b/LayoutTests/fast/frames/frame-set-rotation-hit.html
@@ -4,12 +4,12 @@
 
     <script>
         function init() {
-            if (!window.eventSender || !window.internals)
+            if (!window.eventSender)
                 return;
             // Scale the page and resize the frames to verify hit testing on the frameset
             var leftPanelWidth = window.innerWidth / 8;
             var panelHeight = window.innerHeight / 2;
-            window.internals.setPageScaleFactor(0.5, 0, 0);
+            eventSender.setPageScaleFactor(0.5, 0, 0);
             eventSender.mouseMoveTo(panelHeight / 2, leftPanelWidth);
             eventSender.mouseDown();
             eventSender.mouseMoveTo(panelHeight / 2, 2 * leftPanelWidth);