aura: Add X11 host window management.

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 d04b3520789b5444032990b83ed80752adfc0dfd..dbd69101ca47ae0a6b30ad4541d57f6b9f1927a8 100644
--- a/ui/aura/root_window_host_win.cc
+++ b/ui/aura/root_window_host_win.cc
@@ -151,6 +151,11 @@ gfx::AcceleratedWidget RootWindowHostWin::GetAcceleratedWidget() {
   return hwnd();
 }
 
+gfx::AcceleratedWidget RootWindowHostWin::
+    GetAcceleratedWidgetUsedForEvents() {
+  return hwnd();
+}
+
 void RootWindowHostWin::Show() {
   ShowWindow(hwnd(), SW_SHOWNORMAL);
 }
@@ -299,6 +304,11 @@ void RootWindowHostWin::OnDeviceScaleFactorChanged(
   NOTIMPLEMENTED();
 }
 
+bool RootWindowHostWin::DispatchNativeEvent(
+    const base::NativeEvent& native_event) {
+  return false;
+}
+
 void RootWindowHostWin::OnClose() {
   // TODO: this obviously shouldn't be here.
   MessageLoopForUI::current()->Quit();