Makes Panel related classes use ash/wm/common types

ash/wm/aura/wm_globals_aura.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 "ash/wm/aura/wm_globals_aura.h"
 
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/wm/aura/wm_window_aura.h"
 #include "ash/wm/common/wm_activation_observer.h"
+#include "ash/wm/common/wm_display_observer.h"
+#include "ash/wm/common/wm_overview_mode_observer.h"
 #include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/window_util.h"
 #include "ui/aura/client/focus_client.h"
 #include "ui/wm/public/activation_client.h"
 
 namespace ash {
 namespace wm {
 namespace {
 
 WmGlobalsAura* instance_ = nullptr;
 
 }  // namespace
 
 // static
 WmGlobals* WmGlobals::Get() {
   return instance_;
 }
 
 WmGlobalsAura::WmGlobalsAura() {
   DCHECK(!instance_);
   instance_ = this;
+  Shell::GetInstance()->AddShellObserver(this);
 }
 
 WmGlobalsAura::~WmGlobalsAura() {
   instance_ = nullptr;
   if (added_activation_observer_) {
     aura::client::GetActivationClient(Shell::GetPrimaryRootWindow())
         ->RemoveObserver(this);
   }
+  if (added_display_observer_)
+    Shell::GetInstance()->window_tree_host_manager()->RemoveObserver(this);
+
+  Shell::GetInstance()->RemoveShellObserver(this);
 }
 
 // static
 WmGlobalsAura* WmGlobalsAura::Get() {
   if (!instance_)
     new WmGlobalsAura;
   return instance_;
 }
 
 WmWindow* WmGlobalsAura::GetFocusedWindow() {
@@ skipping 56 matching lines @@
     aura::client::GetActivationClient(Shell::GetPrimaryRootWindow())
         ->AddObserver(this);
   }
   activation_observers_.AddObserver(observer);
 }
 
 void WmGlobalsAura::RemoveActivationObserver(WmActivationObserver* observer) {
   activation_observers_.RemoveObserver(observer);
 }
 
+void WmGlobalsAura::AddDisplayObserver(WmDisplayObserver* observer) {
+  if (!added_display_observer_) {
+    added_display_observer_ = true;
+    Shell::GetInstance()->window_tree_host_manager()->AddObserver(this);
+  }
+  display_observers_.AddObserver(observer);
+}
+
+void WmGlobalsAura::RemoveDisplayObserver(WmDisplayObserver* observer) {
+  display_observers_.RemoveObserver(observer);
+}
+
+void WmGlobalsAura::AddOverviewModeObserver(WmOverviewModeObserver* observer) {
+  overview_mode_observers_.AddObserver(observer);
+}
+
+void WmGlobalsAura::RemoveOverviewModeObserver(
+    WmOverviewModeObserver* observer) {
+  overview_mode_observers_.RemoveObserver(observer);
+}
+
 void WmGlobalsAura::OnWindowActivated(
     aura::client::ActivationChangeObserver::ActivationReason reason,
     aura::Window* gained_active,
     aura::Window* lost_active) {
   FOR_EACH_OBSERVER(WmActivationObserver, activation_observers_,
                     OnWindowActivated(WmWindowAura::Get(gained_active),
                                       WmWindowAura::Get(lost_active)));
 }
 
+void WmGlobalsAura::OnDisplayConfigurationChanged() {
+  FOR_EACH_OBSERVER(WmDisplayObserver, display_observers_,
+                    OnDisplayConfigurationChanged());
+}
+
+void WmGlobalsAura::OnOverviewModeEnded() {
+  FOR_EACH_OBSERVER(WmOverviewModeObserver, overview_mode_observers_,
+                    OnOverviewModeEnded());
+}
+
 }  // namespace wm
 }  // namespace ash