Merge 147181 "[chromium] Use widget.parent() for plugin WebMouse..."

Source/WebKit/chromium/src/WebInputEventConversion.cpp

Index: Source/WebKit/chromium/src/WebInputEventConversion.cpp
===================================================================
--- Source/WebKit/chromium/src/WebInputEventConversion.cpp	(revision 147287)
+++ Source/WebKit/chromium/src/WebInputEventConversion.cpp	(working copy)
@@ -433,8 +433,10 @@
     webEvent.timeStampSeconds = event.timeStamp() / millisPerSecond;
     webEvent.modifiers = getWebInputModifiers(event);
 
-    ScrollView* view = widget.root();
-    IntPoint windowPoint = view->contentsToWindow(IntPoint(event.absoluteLocation().x(), event.absoluteLocation().y()));
+    ScrollView* view = widget.parent();
+    IntPoint windowPoint = IntPoint(event.absoluteLocation().x(), event.absoluteLocation().y());
+    if (view)
+        windowPoint = view->contentsToWindow(windowPoint);
     webEvent.globalX = event.screenX();
     webEvent.globalY = event.screenY();
     webEvent.windowX = windowPoint.x();