Revert of Clean up WindowEventDispatcher some more.

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
index 4eb30c4a390160483671d9f40f8d0bb4a7155cbd..71fe892b53548bfe7b3abe072e8d5e6bdb2c4950 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
@@ -183,7 +183,7 @@
 void DesktopWindowTreeHostX11::HandleNativeWidgetActivationChanged(
     bool active) {
   if (active) {
-    OnHostActivated();
+    delegate_->OnHostActivated();
     open_windows().remove(xwindow_);
     open_windows().insert(open_windows().begin(), xwindow_);
   }
@@ -237,6 +237,7 @@
   dispatcher_->window()->SetProperty(kViewsWindowForRootWindow,
                                      content_window_);
   dispatcher_->window()->SetProperty(kHostForRootWindow, this);
+  delegate_ = dispatcher_;
 
   // If we're given a parent, we need to mark ourselves as transient to another
   // window. Otherwise activation gets screwy.
@@ -926,7 +927,7 @@
 // DesktopWindowTreeHostX11, ui::EventSource implementation:
 
 ui::EventProcessor* DesktopWindowTreeHostX11::GetEventProcessor() {
-  return dispatcher();
+  return delegate_->GetEventProcessor();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -1134,7 +1135,7 @@
 void DesktopWindowTreeHostX11::OnCaptureReleased() {
   x11_capture_.reset();
   g_current_capture = NULL;
-  OnHostLostWindowCapture();
+  delegate_->OnHostLostWindowCapture();
   native_widget_delegate_->OnMouseCaptureLost();
 }
 
@@ -1347,9 +1348,9 @@
     case FocusOut:
       if (xev->xfocus.mode != NotifyGrab) {
         ReleaseCapture();
-        OnHostLostWindowCapture();
+        delegate_->OnHostLostWindowCapture();
       } else {
-        dispatcher()->OnHostLostMouseGrab();
+        delegate_->OnHostLostMouseGrab();
       }
       break;
     case FocusIn:
@@ -1420,7 +1421,8 @@
             int button = xievent->detail;
             if (button == kBackMouseButton || button == kForwardMouseButton) {
               aura::client::UserActionClient* gesture_client =
-                  aura::client::GetUserActionClient(window());
+                  aura::client::GetUserActionClient(
+                      delegate_->AsDispatcher()->window());
               if (gesture_client) {
                 bool reverse_direction =
                     ui::IsTouchpadEvent(xev) && ui::IsNaturalScrollEnabled();