mash: wires up shadows for mash

services/ui/ws/window_manager_state.cc

 // Copyright 2016 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_manager_state.h"
 
 #include <utility>
 
 #include "base/memory/weak_ptr.h"
 #include "services/service_manager/public/interfaces/connector.mojom.h"
@@ skipping 469 matching lines @@
 #if !defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)
   // Error so it will be collected in system logs.
   for (Display* display : display_manager()->displays()) {
     WindowManagerDisplayRoot* display_root =
         display->GetWindowManagerDisplayRootForUser(user_id());
     if (display_root) {
       LOG(ERROR) << "ServerWindow hierarchy:\n"
                  << display_root->root()->GetDebugWindowHierarchy();
     }
   }
+  ServerWindow* focused_window = GetFocusedWindowForEventDispatcher();
+  LOG(ERROR) << "Focused window: "
+             << (focused_window ? focused_window->id().ToString() : "(null)");
 #endif
 }
 
 void WindowManagerState::ScheduleInputEventTimeout(WindowTree* tree,
                                                    ServerWindow* target,
                                                    const Event& event,
                                                    EventDispatchPhase phase) {
   std::unique_ptr<InFlightEventDetails> details =
       base::MakeUnique<InFlightEventDetails>(tree, event_processing_display_id_,
                                              event, phase);
@@ skipping 165 matching lines @@
       window->RemoveObserver(this);
       orphaned_window_manager_display_roots_.erase(iter);
       return;
     }
   }
   NOTREACHED();
 }
 
 }  // namespace ws
 }  // namespace ui