Visual improvements to text filtering in Ash overview mode

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 34 matching lines @@
 class WindowGrid;
 
 // The WindowSelector shows a grid of all of your windows, allowing to select
 // one by clicking or tapping on it.
 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;
+
   enum Direction {
     LEFT,
     UP,
     RIGHT,
     DOWN
   };
 
   typedef std::vector<aura::Window*> WindowList;
   typedef ScopedVector<WindowSelectorItem> WindowSelectorItemList;
 
@@ skipping 100 matching lines @@
   // The number of times the text filtering textfield has been cleared of text
   // during this overview mode session.
   size_t num_times_textfield_cleared_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowSelector);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_OVERVIEW_WINDOW_SELECTOR_H_