Moves CustomFrameViewAsh to common

ash/common/wm/immersive/wm_immersive_fullscreen_controller.h

+// Copyright 2016 The Chromium Authors. All rights reserved.

[James Cook, 2016/08/05 23:40:36]

optional thought: I'm not sure it's worth it to create another subdirectory for
"immersive". //ash/common/wm/immersive/ is kinda deep, and it only has a few
files.

[sky, 2016/08/06 15:32:46]

Ya, I don't particularly like the depth either. OTOH I have a feeling there are
going to be more files ending up here (there is already two in the parent
directory I want to move here).

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ASH_COMMON_WM_IMMERSIVE_WM_IMMERSIVE_FULLSCREEN_CONTROLLER_H_
+#define ASH_COMMON_WM_IMMERSIVE_WM_IMMERSIVE_FULLSCREEN_CONTROLLER_H_
+
+#include "ash/ash_export.h"
+
+namespace views {
+class View;
+class Widget;
+}
+
+namespace ash {
+
+class WmImmersiveFullscreenControllerDelegate;
+
+// Controller for immersive mode. See ImmersiveFullscreenController for details.
+class ASH_EXPORT WmImmersiveFullscreenController {
+ public:
+  // The enum is used for an enumerated histogram. New items should be only
+  // added to the end.
+  enum WindowType {
+    WINDOW_TYPE_OTHER,
+    WINDOW_TYPE_BROWSER,
+    WINDOW_TYPE_HOSTED_APP,
+    WINDOW_TYPE_PACKAGED_APP,
+    WINDOW_TYPE_COUNT
+  };
+
+  virtual ~WmImmersiveFullscreenController() {}
+
+  // Initializes the controller. Must be called prior to enabling immersive
+  // fullscreen via SetEnabled(). |top_container| is used to keep the
+  // top-of-window views revealed when a child of |top_container| has focus.
+  // |top_container| does not affect which mouse and touch events keep the
+  // top-of-window views revealed.
+  virtual void Init(WmImmersiveFullscreenControllerDelegate* delegate,
+                    views::Widget* widget,

[James Cook, 2016/08/05 23:40:36]

nit: Document or rename this to indicate which widget it is supposed to be.

[sky, 2016/08/06 15:32:46]

Done.

+                    views::View* top_container) = 0;
+
+  // Enables or disables immersive fullscreen.
+  // |window_type| is the type of window which is put in immersive fullscreen.
+  // It is only used for histogramming.
+  virtual void SetEnabled(WindowType window_type, bool enable) = 0;
+
+  // Returns true if in immersive fullscreen.
+  virtual bool IsEnabled() const = 0;
+
+  // Returns true if in immersive fullscreen and the top-of-window views are
+  // fully or partially visible.
+  virtual bool IsRevealed() const = 0;
+};
+
+}  // namespace ash
+
+#endif  // ASH_COMMON_WM_IMMERSIVE_WM_IMMERSIVE_FULLSCREEN_CONTROLLER_H_