Fix incorrect use of AXState caused when refactoring two enums into one.

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/keycodes/keyboard_codes.h"
 #include "ui/gfx/animation/throb_animation.h"
@@ skipping 270 matching lines @@
 }
 
 void CustomButton::OnDragDone() {
   SetState(STATE_NORMAL);
 }
 
 void CustomButton::GetAccessibleState(ui::AXViewState* state) {
   Button::GetAccessibleState(state);
   switch (state_) {
     case STATE_HOVERED:
-      state->state = ui::AX_STATE_HOVERED;
+      state->AddStateFlag(ui::AX_STATE_HOVERED);
       break;
     case STATE_PRESSED:
-      state->state = ui::AX_STATE_PRESSED;
+      state->AddStateFlag(ui::AX_STATE_PRESSED);
       break;
     case STATE_DISABLED:
-      state->state = ui::AX_STATE_DISABLED;
+      state->AddStateFlag(ui::AX_STATE_DISABLED);
       break;
     case STATE_NORMAL:
     case STATE_COUNT:
       // No additional accessibility state set for this button state.
       break;
   }
 }
 
 void CustomButton::VisibilityChanged(View* starting_from, bool visible) {
   if (state_ == STATE_DISABLED)
@@ skipping 44 matching lines @@
   if (!details.is_add && state_ != STATE_DISABLED)
     SetState(STATE_NORMAL);
 }
 
 void CustomButton::OnBlur() {
   if (IsHotTracked())
     SetState(STATE_NORMAL);
 }
 
 }  // namespace views