Cleanup: remove NotifyAccessibilityEvent from views::Widget.

ui/views/controls/slider.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/slider.h"
 
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
@@ skipping 85 matching lines @@
     // There is no message-loop when running tests. So we cannot animate then.
     animating_value_ = old_value;
     move_animation_.reset(new ui::SlideAnimation(this));
     move_animation_->SetSlideDuration(kSlideValueChangeDurationMS);
     move_animation_->Show();
     AnimationProgressed(move_animation_.get());
   } else {
     SchedulePaint();
   }
   if (accessibility_events_enabled_ && GetWidget()) {
-    GetWidget()->NotifyAccessibilityEvent(
-        this, ui::AccessibilityTypes::EVENT_VALUE_CHANGED, true);
+    NotifyAccessibilityEvent(
+        ui::AccessibilityTypes::EVENT_VALUE_CHANGED, true);
   }
 }
 
 void Slider::PrepareForMove(const gfx::Point& point) {
   // Try to remember the position of the mouse cursor on the button.
   gfx::Insets inset = GetInsets();
   gfx::Rect content = GetContentsBounds();
   float value = move_animation_.get() && move_animation_->is_animating() ?
         animating_value_ : value_;
 
@@ skipping 201 matching lines @@
 void Slider::OnPaintFocusBorder(gfx::Canvas* canvas) {
   if (!focus_border_color_) {
     View::OnPaintFocusBorder(canvas);
   } else if (HasFocus() && (focusable() || IsAccessibilityFocusable())) {
     canvas->DrawRect(gfx::Rect(1, 1, width() - 3, height() - 3),
                      focus_border_color_);
   }
 }
 
 }  // namespace views