Aura/ash split: Don't use X11 window borders.

ui/aura/root_window_host_win.cc

Index: ui/aura/root_window_host_win.cc
diff --git a/ui/aura/root_window_host_win.cc b/ui/aura/root_window_host_win.cc
index cf746acfa108b4977fbaba9b50afffa8129972b8..337f0347ccfb86eabda7e854bdd455b61ace4f7a 100644
--- a/ui/aura/root_window_host_win.cc
+++ b/ui/aura/root_window_host_win.cc
@@ -286,6 +286,15 @@ void RootWindowHostWin::PostNativeEvent(const base::NativeEvent& native_event) {
       hwnd(), native_event.message, native_event.wParam, native_event.lParam);
 }
 
+void RootWindowHostWin::SetUseHostWindowBorders(bool use_os_borders) {
+  NOTIMPLEMENTED();
+}
+
+bool RootWindowHostWin::DispatchHostWindowDragMovement(int hittest,
+                                                       MouseEvent* event) {
+  return false;
+}
+
 void RootWindowHostWin::OnClose() {
   // TODO: this obviously shouldn't be here.
   MessageLoopForUI::current()->Quit();