Folds methods in WmShellCommon to WmShell

ash/common/wm_shell_common.h

Index: ash/common/wm_shell_common.h
diff --git a/ash/common/wm_shell_common.h b/ash/common/wm_shell_common.h
deleted file mode 100644
index d504c4eba32ba2fc68220e11795c3fa66bfb38c3..0000000000000000000000000000000000000000
--- a/ash/common/wm_shell_common.h
+++ /dev/null
@@ -1,53 +0,0 @@
-// 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.
-
-#ifndef ASH_COMMON_WM_SHELL_COMMON_H_
-#define ASH_COMMON_WM_SHELL_COMMON_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "base/macros.h"
-#include "base/observer_list.h"
-
-namespace ash {
-
-class MruWindowTracker;
-class ShellObserver;
-class WmWindow;
-
-// Contains code used by both shell implementations.
-class ASH_EXPORT WmShellCommon {
- public:
-  WmShellCommon();
-  ~WmShellCommon();
-
-  MruWindowTracker* mru_window_tracker() { return mru_window_tracker_.get(); }
-
-  void CreateMruWindowTracker();
-  void DeleteMruWindowTracker();
-
-  // ShellObserver related functions:
-  void AddShellObserver(ShellObserver* observer);
-  void RemoveShellObserver(ShellObserver* observer);
-  base::ObserverList<ShellObserver>* shell_observers() {
-    return &shell_observers_;
-  }
-
-  // Notifies |observers_| when entering or exiting pinned mode for
-  // |pinned_window|. Entering or exiting can be checked by looking at
-  // |pinned_window|'s window state.
-  void NotifyPinnedStateChanged(WmWindow* pinned_window);
-
- private:
-  std::unique_ptr<MruWindowTracker> mru_window_tracker_;
-
-  base::ObserverList<ShellObserver> shell_observers_;
-
-  DISALLOW_COPY_AND_ASSIGN(WmShellCommon);
-};
-
-}  // namespace ash
-
-#endif  // ASH_COMMON_WM_SHELL_COMMON_H_