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..7c9deec0ec2ebf3db7b6ac612cba5e78fdfb8393 100644
--- a/ash/wm/overview/window_grid.h
+++ b/ash/wm/overview/window_grid.h
@@ -66,6 +66,11 @@ class ASH_EXPORT WindowGrid : public aura::WindowObserver {
   // this grid owns.
   bool Contains(const aura::Window* window) const;
 
+  // Dims the items that do not match the given pattern and prevents their

[flackr, 2014/06/26 17:33:07]

nit:s/that do not match the given pattern/whose titles do not contain |pattern|

[Nina, 2014/06/27 15:20:39]

Done.

+  // selection. The pattern has its accents removed and is converted to
+  // lowercase in a l10n sensitive context.
+  void FilterItems(const base::string16& pattern);
+
   // Returns true if the grid has no more windows.
   bool empty() const { return window_list_.empty(); }
 
@@ -124,6 +129,9 @@ class ASH_EXPORT WindowGrid : public aura::WindowObserver {
   // Current selected window position.
   size_t selected_index_;
 
+  // Indicates if there is at least one undimmed item in the overview.
+  bool has_active_item_;
+
   // Number of columns in the grid.
   size_t num_columns_;