Support multiple displays for PagePopup

Source/core/page/PagePopupController.idl

Index: Source/core/page/PagePopupController.idl
diff --git a/Source/core/page/PagePopupController.idl b/Source/core/page/PagePopupController.idl
index 4aca401643bad3f566db923d96859b0f445650e9..28051d06fab11194ee84e29bc85eab9b336659b2 100644
--- a/Source/core/page/PagePopupController.idl
+++ b/Source/core/page/PagePopupController.idl
@@ -42,4 +42,8 @@
     DOMString formatShortMonth(long year, long zeroBaseMonth);
     DOMString formatWeek(long year, long weekNumber, DOMString localizedStartDate);
     void histogramEnumeration(DOMString name, long sample, long boundaryValue);
+    // window.resizeTo/moveTo are not suitable because LocalDOMWindow adjusts
+    // rectangle to fit in the current screen. Popups sometimes need to be
+    // positioned on other screens.
+    void setWindowRect(long x, long y,long width, long height);
 };