Convert //ash from scoped_ptr to std::unique_ptr

ash/accelerators/magnifier_key_scroller.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/accelerators/magnifier_key_scroller.h"
 
 #include <utility>
 
 #include "ash/accelerators/key_hold_detector.h"
 #include "ash/ash_switches.h"
@@ skipping 18 matching lines @@
   return (magnifier_key_scroller_enabled || has_switch) &&
       ash::Shell::GetInstance()->magnification_controller()->IsEnabled();
 }
 
 // static
 void MagnifierKeyScroller::SetEnabled(bool enabled) {
   magnifier_key_scroller_enabled = enabled;
 }
 
 // static
-scoped_ptr<ui::EventHandler> MagnifierKeyScroller::CreateHandler() {
-  scoped_ptr<KeyHoldDetector::Delegate> delegate(new MagnifierKeyScroller());
-  return scoped_ptr<ui::EventHandler>(new KeyHoldDetector(std::move(delegate)));
+std::unique_ptr<ui::EventHandler> MagnifierKeyScroller::CreateHandler() {
+  std::unique_ptr<KeyHoldDetector::Delegate> delegate(
+      new MagnifierKeyScroller());
+  return std::unique_ptr<ui::EventHandler>(
+      new KeyHoldDetector(std::move(delegate)));
 }
 
 bool MagnifierKeyScroller::ShouldProcessEvent(const ui::KeyEvent* event) const {
   return IsEnabled() &&
       (event->key_code() == ui::VKEY_UP ||
        event->key_code() == ui::VKEY_DOWN ||
        event->key_code() == ui::VKEY_LEFT ||
        event->key_code() == ui::VKEY_RIGHT);
 }
 
@@ skipping 31 matching lines @@
   MagnificationController* controller =
       Shell::GetInstance()->magnification_controller();
   controller->SetScrollDirection(MagnificationController::SCROLL_NONE);
 }
 
 MagnifierKeyScroller::MagnifierKeyScroller() {}
 
 MagnifierKeyScroller::~MagnifierKeyScroller() {}
 
 }  // namespace ash