Allow Alt-Tab to move the focus to docked windows.

ash/wm/overview/window_selector.h

 // Copyright 2013 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_WM_OVERVIEW_WINDOW_SELECTOR_H_
 #define ASH_WM_OVERVIEW_WINDOW_SELECTOR_H_
 
 #include <set>
 #include <vector>
 
@@ skipping 38 matching lines @@
 class ASH_EXPORT WindowSelector
     : public gfx::DisplayObserver,
       public aura::WindowObserver,
       public aura::client::ActivationChangeObserver,
       public views::TextfieldController {
  public:
   // The distance between the top edge of the screen and the bottom edge of
   // the text filtering textfield.
   static const int kTextFilterBottomEdge;
 
+  // Returns true if the window can be selected in overview mode.
+  static bool IsSelectable(aura::Window* window);
+
   enum Direction {
     LEFT,
     UP,
     RIGHT,
     DOWN
   };
 
   typedef std::vector<aura::Window*> WindowList;
   typedef ScopedVector<WindowSelectorItem> WindowSelectorItemList;
 
@@ skipping 40 matching lines @@
 
  private:
   friend class WindowSelectorTest;
 
   // Begins positioning windows such that all windows are visible on the screen.
   void StartOverview();
 
   // Position all of the windows in the overview.
   void PositionWindows(bool animate);
 
-  // Hide and track all hidden windows not in the overview item list.
-  void HideAndTrackNonOverviewWindows();
-
   // |focus|, restores focus to the stored window.
   void ResetFocusRestoreWindow(bool focus);
 
   // Helper function that moves the selection widget to |direction| on the
   // corresponding window grid.
   void Move(Direction direction, bool animate);
 
   // Removes all observers that were registered during construction and/or
   // initialization.
   void RemoveAllObservers();
@@ skipping 10 matching lines @@
   // this window.
   aura::Window* restore_focus_window_;
 
   // True when performing operations that may cause window activations. This is
   // used to prevent handling the resulting expected activation.
   bool ignore_activations_;
 
   // List of all the window overview grids, one for each root window.
   ScopedVector<WindowGrid> grid_list_;
 
-  // Tracks windows which were hidden because they were not part of the
-  // overview.
-  aura::WindowTracker hidden_windows_;
-
   // Tracks the index of the root window the selection widget is in.
   size_t selected_grid_index_;
 
   // The following variables are used for metric collection purposes. All of
   // them refer to this particular overview session and are not cumulative:
   // The time when overview was started.
   base::Time overview_start_time_;
 
   // The number of arrow key presses.
   size_t num_key_presses_;
@@ skipping 19 matching lines @@
   // Tracks whether minimized windows are currently being restored for overview
   // mode.
   bool restoring_minimized_windows_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowSelector);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_OVERVIEW_WINDOW_SELECTOR_H_