Revert of Make File-Picker modal on Linux

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 f133af35d5c350b5e2f6a1697805f536a77124d0..a56deb7fc9f851beedb554a21c8019a0eee2599a 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
@@ -28,7 +28,6 @@
 #include "ui/events/devices/x11/device_list_cache_x11.h"
 #include "ui/events/devices/x11/touch_factory_x11.h"
 #include "ui/events/event_utils.h"
-#include "ui/events/null_event_targeter.h"
 #include "ui/events/platform/platform_event_source.h"
 #include "ui/events/platform/x11/x11_event_source.h"
 #include "ui/gfx/display.h"
@@ -172,7 +171,6 @@
       window_parent_(NULL),
       custom_window_shape_(false),
       urgency_hint_set_(false),
-      modal_dialog_xid_(0),
       close_widget_factory_(this) {
 }
 
@@ -2035,25 +2033,6 @@
   return gfx::ToEnclosingRect(rect_in_pixels);
 }
 
-const XID DesktopWindowTreeHostX11::GetModalDialog() {
-  return modal_dialog_xid_;
-}
-
-void DesktopWindowTreeHostX11::DisableEventListening(XID dialog) {
-  DCHECK(modal_dialog_xid_);
-  modal_dialog_xid_ = dialog;
-  // ScopedWindowTargeter is used to temporarily replace the event-targeter
-  // with NullEventTargeter to make |dialog| modal.
-  targeter_for_modal_.reset(new aura::ScopedWindowTargeter(window(),
-      scoped_ptr<ui::EventTargeter>(new ui::NullEventTargeter)));
-}
-
-void DesktopWindowTreeHostX11::EnableEventListening() {
-  DCHECK(!modal_dialog_xid_);
-  modal_dialog_xid_ = 0;
-  targeter_for_modal_.reset();
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopWindowTreeHost, public: