More NativeWidget -> Widget notifications: visibility, minimize.

ui/views/cocoa/bridged_native_widget.h

 // Copyright 2014 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 UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_
 #define UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/scoped_nsobject.h"
@@ skipping 47 matching lines @@
   void OnFullscreenTransitionStart(bool target_fullscreen_state);
 
   // Called when a fullscreen transition completes. If target_fullscreen_state()
   // does not match |actual_fullscreen_state|, a new transition will begin.
   void OnFullscreenTransitionComplete(bool actual_fullscreen_state);
 
   // Transition the window into or out of fullscreen. This will immediately
   // invert the value of target_fullscreen_state().
   void ToggleDesiredFullscreenState();
 
+  // Called by the NSWindowDelegate when the visibility of the window may have
+  // changed. For example, due to a (de)miniaturize operation, or the window
+  // being reordered in (or out of) the screen list.
+  void OnVisibilityChanged();
+
   // See widget.h for documentation.
   InputMethod* CreateInputMethod();
   ui::InputMethod* GetHostInputMethod();
 
   // The restored bounds will be derived from the current NSWindow frame unless
   // fullscreen or transitioning between fullscreen states.
   gfx::Rect GetRestoredBounds() const;
 
   NativeWidgetMac* native_widget_mac() { return native_widget_mac_; }
   BridgedContentView* ns_view() { return bridged_view_; }
@@ skipping 21 matching lines @@
   gfx::Rect bounds_before_fullscreen_;
 
   // Whether this window wants to be fullscreen. If a fullscreen animation is in
   // progress then it might not be actually fullscreen.
   bool target_fullscreen_state_;
 
   // Whether this window is in a fullscreen transition, and the fullscreen state
   // can not currently be changed.
   bool in_fullscreen_transition_;
 
+  // Stores the value last read from -[NSWindow isVisible], to detect visibility
+  // changes.
+  bool window_visible_;
+
   // Overridden from FocusChangeListener:
   virtual void OnWillChangeFocus(View* focused_before,
                                  View* focused_now) override;
   virtual void OnDidChangeFocus(View* focused_before,
                                 View* focused_now) override;
 
   DISALLOW_COPY_AND_ASSIGN(BridgedNativeWidget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_H_