Don't fire a FOCUS accessibility event on a View that doesn't have focus.

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 <utility>
@@ skipping 373 matching lines @@
     window_selector_->OnGridEmpty(this);
     return;
   }
 
   // If selecting, update the selection index.
   if (selection_widget_) {
     bool send_focus_alert = selected_index_ == removed_index;
     if (selected_index_ >= removed_index && selected_index_ != 0)
       selected_index_--;
     if (send_focus_alert)
-      SelectedWindow()->SendFocusAlert();
+      SelectedWindow()->SendAccessibleSelectionEvent();
   }
 
   PositionWindows(true);
 }
 
 void WindowGrid::OnWindowBoundsChanged(aura::Window* window,
                                        const gfx::Rect& old_bounds,
                                        const gfx::Rect& new_bounds) {
   ScopedVector<WindowSelectorItem>::const_iterator iter =
       std::find_if(window_list_.begin(), window_list_.end(),
@@ skipping 78 matching lines @@
         old_selection->GetNativeWindow()->bounds() + fade_out_direction);
     old_selection->Hide();
   }
   if (out_of_bounds)
     return;
 
   if (!selection_widget_)
     InitSelectionWidget(direction);
   // Send an a11y alert so that if ChromeVox is enabled, the item label is
   // read.
-  SelectedWindow()->SendFocusAlert();
+  SelectedWindow()->SendAccessibleSelectionEvent();
   // The selection widget is moved to the newly selected item in the same
   // grid.
   MoveSelectionWidgetToTarget(animate);
 }
 
 void WindowGrid::MoveSelectionWidgetToTarget(bool animate) {
   if (animate) {
     ui::ScopedLayerAnimationSettings animation_settings(
         selection_widget_->GetNativeWindow()->layer()->GetAnimator());
     animation_settings.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
         kOverviewSelectorTransitionMilliseconds));
     animation_settings.SetTweenType(gfx::Tween::LINEAR_OUT_SLOW_IN);
     animation_settings.SetPreemptionStrategy(
         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