Fix the html select tag showing up at the wrong position. This was a regression from r166446.

ui/aura/root_window_host_win.cc

Index: ui/aura/root_window_host_win.cc
===================================================================
--- ui/aura/root_window_host_win.cc	(revision 168290)
+++ ui/aura/root_window_host_win.cc	(working copy)
@@ -264,6 +264,11 @@
   return DefWindowProc(hwnd(), message, w_param, l_param);
 }
 
+void RootWindowHostWin::OnMove(const CPoint& point) {
+  if (delegate_)
+    delegate_->OnHostMoved(gfx::Point(point.x, point.y));
+}
+
 void RootWindowHostWin::OnPaint(HDC dc) {
   delegate_->OnHostPaint();
   ValidateRect(hwnd(), NULL);