DevTools: Fix frontend compilation after r184356

Source/devtools/front_end/ui/UIUtils.js

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.com).
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
@@ skipping 64 matching lines @@
     WebInspector._mouseOutWhileDraggingTargetDocument = targetDocument;
 
     targetDocument.addEventListener("mousemove", WebInspector._elementDragMove, true);
     targetDocument.addEventListener("mouseup", WebInspector._elementDragEnd, true);
     targetDocument.addEventListener("mouseout", WebInspector._mouseOutWhileDragging, true);
 
     var targetElement = /** @type {!Element} */ (event.target);
     if (typeof cursor === "string") {
         WebInspector._restoreCursorAfterDrag = restoreCursor.bind(null, targetElement.style.cursor);
         targetElement.style.cursor = cursor;
-        document.body.style.cursor = cursor;
+        targetDocument.body.style.cursor = cursor;
     }
     function restoreCursor(oldCursor)
     {
         targetDocument.body.style.removeProperty("cursor");
         targetElement.style.cursor = oldCursor;
         WebInspector._restoreCursorAfterDrag = null;
     }
     event.preventDefault();
 }
 
@@ skipping 1079 matching lines @@
 /**
  * @param {!Window} window
  */
 WebInspector.initializeUIUtils = function(window)
 {
     window.addEventListener("focus", WebInspector._windowFocused.bind(WebInspector, window.document), false);
     window.addEventListener("blur", WebInspector._windowBlurred.bind(WebInspector, window.document), false);
     window.document.addEventListener("focus", WebInspector._focusChanged.bind(WebInspector, window.document), true);
     window.document.addEventListener("blur", WebInspector._documentBlurred.bind(WebInspector, window.document), true);
 }