| <html> | 
 |   <head> | 
 |     <title>Frame Scale Hit Test</title> | 
 |     <style> | 
 |         ::-webkit-scrollbar { | 
 |             width: 0px; | 
 |             height: 0px; | 
 |         } | 
 |     </style> | 
 |  | 
 |     <script> | 
 |         function init() { | 
 |             if (!window.eventSender || !window.internals) | 
 |                 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; | 
 |             internals.setPageScaleFactorLimits(0.5, 0.5); | 
 |             internals.setPageScaleFactor(0.5); | 
 |             eventSender.mouseMoveTo(leftPanelWidth, panelHeight / 2); | 
 |             eventSender.mouseDown(); | 
 |             eventSender.mouseMoveTo(2 * leftPanelWidth, panelHeight / 2); | 
 |             eventSender.mouseUp(); | 
 |         } | 
 |         window.onload = init; | 
 |     </script> | 
 |   </head> | 
 |   <frameset style="width: 4000px; height: 4000px; background-color: red; -webkit-transform-origin: 0% 0%;" cols="25%,75%"> | 
 |     <frame src="data:text/html,<body bgcolor='green'></body>"> | 
 |     <frame src="data:text/html,<body bgcolor='green'></body>"> | 
 |   </frameset> | 
 | </html> |