Added text filtering to Overview Mode

ash/wm/overview/window_grid.h

Index: ash/wm/overview/window_grid.h
diff --git a/ash/wm/overview/window_grid.h b/ash/wm/overview/window_grid.h
index fe4bf780ccc21a98c4ef46edd122fd684f5a437c..0b1797bfb76e0df6e27753f7dbffdca3b4eb0632 100644
--- a/ash/wm/overview/window_grid.h
+++ b/ash/wm/overview/window_grid.h
@@ -57,7 +57,7 @@ class ASH_EXPORT WindowGrid : public aura::WindowObserver {
   // Updates |selected_index_| according to the specified |direction| and calls
   // MoveSelectionWidget(). Returns |true| if the new selection index is out of
   // this window grid bounds.
-  bool Move(WindowSelector::Direction direction);
+  bool Move(WindowSelector::Direction direction, bool animate);
 
   // Returns the target selected window, or NULL if there is none selected.
   WindowSelectorItem* SelectedWindow() const;
@@ -66,6 +66,12 @@ class ASH_EXPORT WindowGrid : public aura::WindowObserver {
   // this grid owns.
   bool Contains(const aura::Window* window) const;
 
+  // Dims the items whose titles do not contain |pattern| and prevents their
+  // selection. The pattern has its accents removed and is converted to
+  // lowercase in a l10n sensitive context.
+  // If |pattern| is empty, no item is dimmed.
+  void FilterItems(const base::string16& pattern);
+
   // Returns true if the grid has no more windows.
   bool empty() const { return window_list_.empty(); }
 
@@ -98,7 +104,8 @@ class ASH_EXPORT WindowGrid : public aura::WindowObserver {
   // Moves the selection widget to the specified |direction|.
   void MoveSelectionWidget(WindowSelector::Direction direction,
                            bool recreate_selection_widget,
-                           bool out_of_bounds);
+                           bool out_of_bounds,
+                           bool animate);
 
   // Moves the selection widget to the targeted window.
   void MoveSelectionWidgetToTarget(bool animate);