Folds methods in WmShellCommon to WmShell

ash/common/wm_shell.cc

Index: ash/common/wm_shell.cc
diff --git a/ash/common/wm_shell.cc b/ash/common/wm_shell.cc
index fb9a63cca61238cc88103715069bea334b5c44bd..5d607d60ebc7507ac1f777c2ceeb83c592e23d27 100644
--- a/ash/common/wm_shell.cc
+++ b/ash/common/wm_shell.cc
@@ -10,6 +10,7 @@
 #include "ash/common/system/chromeos/session/logout_confirmation_controller.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/system_tray_notifier.h"
+#include "ash/common/wm/mru_window_tracker.h"
 #include "ash/common/wm/overview/window_selector_controller.h"
 #include "ash/common/wm_window.h"
 #include "base/bind.h"
@@ -30,6 +31,19 @@ WmShell* WmShell::Get() {
   return instance_;
 }
 
+void WmShell::NotifyPinnedStateChanged(WmWindow* pinned_window) {
+  FOR_EACH_OBSERVER(ShellObserver, shell_observers_,
+                    OnPinnedStateChanged(pinned_window));
+}
+
+void WmShell::AddShellObserver(ShellObserver* observer) {
+  shell_observers_.AddObserver(observer);
+}
+
+void WmShell::RemoveShellObserver(ShellObserver* observer) {
+  shell_observers_.RemoveObserver(observer);
+}
+
 WmShell::WmShell()
     : focus_cycler_(new FocusCycler),
       system_tray_notifier_(new SystemTrayNotifier),
@@ -91,4 +105,12 @@ void WmShell::DeleteWindowSelectorController() {
   window_selector_controller_.reset();
 }
 
+void WmShell::CreateMruWindowTracker() {
+  mru_window_tracker_.reset(new MruWindowTracker);
+}
+
+void WmShell::DeleteMruWindowTracker() {
+  mru_window_tracker_.reset();
+}
+
 }  // namespace ash