Revert of Make File-Picker modal on Linux

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
index 10361522a0c79f9446c85ea4a5ca846242b5a0d9..759194f6b52c03be388b45dee939a8f14db0d312 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
@@ -15,7 +15,6 @@
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
-#include "ui/aura/scoped_window_targeter.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/cursor/cursor_loader_x11.h"
 #include "ui/events/platform/platform_event_dispatcher.h"
@@ -88,16 +87,6 @@ class VIEWS_EXPORT DesktopWindowTreeHostX11
   // internal list of open windows.
   static void CleanUpWindowList(void (*func)(aura::Window* window));
 
-  // Disables event listening to make |dialog| modal.
-  void DisableEventListening(XID dialog);
-
-  // Enables event listening after closing |dialog|.
-  void EnableEventListening();
-
-  // Returns XID of dialog currently displayed. When it returns 0,
-  // there is no dialog on the host window.
-  XID GetModalDialog();
-
  protected:
   // Overridden from DesktopWindowTreeHost:
   void Init(aura::Window* content_window,
@@ -360,10 +349,6 @@ class VIEWS_EXPORT DesktopWindowTreeHostX11
 
   base::CancelableCallback<void()> delayed_resize_task_;
 
-  scoped_ptr<aura::ScopedWindowTargeter> targeter_for_modal_;
-
-  XID modal_dialog_xid_;
-
   base::WeakPtrFactory<DesktopWindowTreeHostX11> close_widget_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopWindowTreeHostX11);