Add user action for changing the active window in Ash overview mode

ash/wm/overview/window_grid.cc

 // Copyright 2014 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_grid.h"
 
 #include <algorithm>
 #include <functional>
 #include <set>
 #include <vector>
@@ skipping 119 matching lines @@
     : root_window_(root_window),
       window_selector_(window_selector) {
 
   for (aura::Window::Windows::const_iterator iter = windows.begin();
        iter != windows.end(); ++iter) {
     if ((*iter)->GetRootWindow() != root_window)
       continue;
     (*iter)->AddObserver(this);
     observed_windows_.insert(*iter);
 
-    window_list_.push_back(new WindowSelectorItem(*iter));
+    window_list_.push_back(new WindowSelectorItem(*iter, window_selector_));
   }
 }
 
 WindowGrid::~WindowGrid() {
   for (std::set<aura::Window*>::iterator iter = observed_windows_.begin();
        iter != observed_windows_.end(); iter++) {
     (*iter)->RemoveObserver(this);
   }
 }
 
@@ skipping 292 matching lines @@
         ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
     selection_widget_->SetBounds(SelectedWindow()->target_bounds());
     selection_widget_->SetOpacity(255);
     return;
   }
   selection_widget_->SetBounds(SelectedWindow()->target_bounds());
   selection_widget_->SetOpacity(255);
 }
 
 }  // namespace ash