Wires up immersive mode for chrome and mash

services/ui/ws/window_finder.cc

 // Copyright 2015 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.
 
 #include "services/ui/ws/window_finder.h"
 
 #include "base/containers/adapters.h"
 #include "services/ui/surfaces/surfaces_state.h"
 #include "services/ui/ws/server_window.h"
 #include "services/ui/ws/server_window_delegate.h"
 #include "services/ui/ws/server_window_surface.h"
 #include "services/ui/ws/server_window_surface_manager.h"
 #include "services/ui/ws/window_coordinate_conversions.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/point_f.h"
 #include "ui/gfx/transform.h"
 
 namespace ui {
 namespace ws {
 
 bool IsValidWindowForEvents(ServerWindow* window) {
   ServerWindowSurfaceManager* surface_manager = window->surface_manager();
+  // Valid windows have at least one of the two surface types. Only an underlay
+  // is valid as we assume the window manager will likely get the event in this
+  // case.
   return surface_manager &&
-         surface_manager->HasSurfaceOfType(mojom::SurfaceType::DEFAULT);
+         (surface_manager->HasSurfaceOfType(mojom::SurfaceType::DEFAULT) ||
+          surface_manager->HasSurfaceOfType(mojom::SurfaceType::UNDERLAY));
 }
 
 ServerWindow* FindDeepestVisibleWindowForEvents(ServerWindow* window,
                                                 gfx::Point* location) {
   if (!window->can_accept_events())
     return nullptr;
 
   const ServerWindow::Windows& children = window->children();
   for (ServerWindow* child : base::Reversed(children)) {
     if (!child->visible() || !child->can_accept_events())
@@ skipping 27 matching lines @@
   ServerWindow* current = window;
   while (current->parent()) {
     transform.Translate(-current->bounds().x(), -current->bounds().y());
     current = current->parent();
   }
   return transform;
 }
 
 }  // namespace ws
 }  // namespace ui