Converts DockedWindowLayoutManager to common ash/wm 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/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;
 }
 
 WmGlobalsAura::~WmGlobalsAura() {
   instance_ = nullptr;
+  if (added_activation_observer_) {
+    aura::client::GetActivationClient(Shell::GetPrimaryRootWindow())
+        ->RemoveObserver(this);
+  }
 }
 
 // static
 WmGlobalsAura* WmGlobalsAura::Get() {
   if (!instance_)
     new WmGlobalsAura;
   return instance_;
 }
 
+WmWindow* WmGlobalsAura::GetFocusedWindow() {
+  return WmWindowAura::Get(
+      aura::client::GetFocusClient(Shell::GetPrimaryRootWindow())
+          ->GetFocusedWindow());
+}
+
 WmWindow* WmGlobalsAura::GetActiveWindow() {
   return WmWindowAura::Get(wm::GetActiveWindow());
 }
 
 WmWindow* WmGlobalsAura::GetRootWindowForDisplayId(int64_t display_id) {
   return WmWindowAura::Get(Shell::GetInstance()
                                ->window_tree_host_manager()
                                ->GetRootWindowForDisplayId(display_id));
 }
 
@@ skipping 24 matching lines @@
 }
 
 std::vector<WmWindow*> WmGlobalsAura::GetAllRootWindows() {
   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
   std::vector<WmWindow*> wm_windows(root_windows.size());
   for (size_t i = 0; i < root_windows.size(); ++i)
     wm_windows[i] = WmWindowAura::Get(root_windows[i]);
   return wm_windows;
 }
 
+void WmGlobalsAura::AddActivationObserver(WmActivationObserver* observer) {
+  if (!added_activation_observer_) {
+    added_activation_observer_ = true;
+    aura::client::GetActivationClient(Shell::GetPrimaryRootWindow())
+        ->AddObserver(this);
+  }
+  activation_observers_.AddObserver(observer);
+}
+
+void WmGlobalsAura::RemoveActivationObserver(WmActivationObserver* observer) {
+  activation_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)));
+}
+
 }  // namespace wm
 }  // namespace ash