Use base::OneShotTimer instead of base::Timer(false, false)

ui/views/controls/scrollbar/overlay_scroll_bar.cc

 // Copyright 2013 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/scrollbar/overlay_scroll_bar.h"
 
 #include "base/macros.h"
 #include "cc/paint/paint_flags.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
@@ skipping 104 matching lines @@
 
     if (GetWidget())
       scroll_bar_->StartHideCountdown();
   } else {
     layer()->SetTransform(gfx::Transform());
     layer()->SetOpacity(ui::kOverlayScrollbarThumbHoverAlpha);
   }
 }
 
 OverlayScrollBar::OverlayScrollBar(bool horizontal)
-    : BaseScrollBar(horizontal), hide_timer_(false, false) {
+    : BaseScrollBar(horizontal) {
   auto* thumb = new Thumb(this);
   SetThumb(thumb);
   thumb->Init();
   set_notify_enter_exit_on_child(true);
   SetPaintToLayer();
   layer()->SetMasksToBounds(true);
   layer()->SetFillsBoundsOpaquely(false);
 }
 
 OverlayScrollBar::~OverlayScrollBar() {}
@@ skipping 48 matching lines @@
 
 void OverlayScrollBar::StartHideCountdown() {
   if (IsMouseHovered())
     return;
   hide_timer_.Start(
       FROM_HERE, ui::kOverlayScrollbarFadeDelay,
       base::Bind(&OverlayScrollBar::Hide, base::Unretained(this)));
 }
 
 }  // namespace views