Added text filtering to Overview Mode

ash/wm/overview/window_selector_panels.cc

 // 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.
 
 #include "ash/wm/overview/window_selector_panels.h"
 
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/overview/scoped_transform_overview_window.h"
@@ skipping 181 matching lines @@
     gfx::Rect bounds = (*iter)->GetBoundsInScreen();
     transform.Translate(bounding_rect.x() - bounds.x(),
                         bounding_rect.y() - bounds.y());
     transform.PreconcatTransform(bounding_transform);
     transform.Translate(bounds.x() - bounding_rect.x(),
                         bounds.y() - bounding_rect.y());
     (*iter)->SetTransform(root_window, transform, animate);
   }
 }
 
+void WindowSelectorPanels::ChangeItemVisibility(bool visible) {
+  for (WindowList::iterator iter = transform_windows_.begin();
+       iter != transform_windows_.end(); iter++) {
+    (*iter)->window()->layer()->SetOpacity(visible ? 1 : 0.5);

[flackr, 2014/06/26 17:33:08]

This may deserve a TODO as I think this will let you see through the individual
panels to the ones behind them which is likely to not be the desired effect.

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

True, I've already seen that and I don't like how it looks. Added TODO(flackr).

+  }
+}
+
 }  // namespace ash