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

ui/views/controls/button/custom_button.cc

 // Copyright (c) 2012 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 "ui/views/controls/button/custom_button.h"
 
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/keycodes/keyboard_codes.h"
@@ skipping 88 matching lines @@
 
 void CustomButton::SetAnimationDuration(int duration) {
   hover_animation_.SetSlideDuration(duration);
 }
 
 void CustomButton::SetHotTracked(bool is_hot_tracked) {
   if (state_ != STATE_DISABLED)
     SetState(is_hot_tracked ? STATE_HOVERED : STATE_NORMAL);
 
   if (is_hot_tracked)
-    NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
+    NotifyAccessibilityEvent(ui::AX_EVENT_HOVER, true);
 }
 
 bool CustomButton::IsHotTracked() const {
   return state_ == STATE_HOVERED;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // CustomButton, View overrides:
 
 void CustomButton::Layout() {
@@ skipping 327 matching lines @@
   Button::NotifyClick(event);
 }
 
 void CustomButton::OnClickCanceled(const ui::Event& event) {
   if (ink_drop_delegate())
     ink_drop_delegate()->OnAction(views::InkDropState::HIDDEN);
   Button::OnClickCanceled(event);
 }
 
 }  // namespace views