Hide/show widget on Windows screen lock/unlock

ui/views/view.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #define _USE_MATH_DEFINES // For VC++ to get M_PI. This has to be first.
 
 #include "ui/views/view.h"
 
 #include <algorithm>
 #include <cmath>
@@ skipping 1888 matching lines @@
   ViewHierarchyChanged(details);
   details.parent->needs_layout_ = true;
 }
 
 void View::PropagateNativeThemeChanged(const ui::NativeTheme* theme) {
   for (int i = 0, count = child_count(); i < count; ++i)
     child_at(i)->PropagateNativeThemeChanged(theme);
   OnNativeThemeChanged(theme);
 }
 
+void View::PropagateSoftVisibilityChanged(bool visible) {
+  for (int i = 0, count = child_count(); i < count; ++i)
+    child_at(i)->PropagateSoftVisibilityChanged(visible);
+  OnSoftVisibilityChanged(visible);
+}
+
 // Size and disposition --------------------------------------------------------
 
 void View::PropagateVisibilityNotifications(View* start, bool is_visible) {
   for (int i = 0, count = child_count(); i < count; ++i)
     child_at(i)->PropagateVisibilityNotifications(start, is_visible);
   VisibilityChangedImpl(start, is_visible);
 }
 
 void View::VisibilityChangedImpl(View* starting_from, bool is_visible) {
   VisibilityChanged(starting_from, is_visible);
@@ skipping 507 matching lines @@
   // Message the RootView to do the drag and drop. That way if we're removed
   // the RootView can detect it and avoid calling us back.
   gfx::Point widget_location(event.location());
   ConvertPointToWidget(this, &widget_location);
   widget->RunShellDrag(this, data, widget_location, drag_operations, source);
   // WARNING: we may have been deleted.
   return true;
 }
 
 }  // namespace views