Convert //ash from scoped_ptr to std::unique_ptr

ash/metrics/user_metrics_recorder_unittest.cc

 // Copyright 2015 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/metrics/user_metrics_recorder.h"
 
+#include <memory>
+
 #include "ash/shelf/shelf_model.h"
 #include "ash/shelf/shelf_util.h"
 #include "ash/shell.h"
 #include "ash/system/user/login_status.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/test_shelf_delegate.h"
 #include "ash/test/test_system_tray_delegate.h"
 #include "ash/test/user_metrics_recorder_test_api.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/test/histogram_tester.h"
 #include "ui/aura/window.h"
 
 namespace ash {
 namespace {
 
 const char kAsh_NumberOfVisibleWindowsInPrimaryDisplay[] =
     "Ash.NumberOfVisibleWindowsInPrimaryDisplay";
 
 const char kAsh_ActiveWindowShowTypeOverTime[] =
@@ skipping 29 matching lines @@
   aura::Window* CreateTestWindow();
 
   test::UserMetricsRecorderTestAPI* user_metrics_recorder_test_api() {
     return user_metrics_recorder_test_api_.get();
   }
 
   base::HistogramTester& histograms() { return histograms_; }
 
  private:
   // Test API to access private members of the test target.
-  scoped_ptr<test::UserMetricsRecorderTestAPI> user_metrics_recorder_test_api_;
+  std::unique_ptr<test::UserMetricsRecorderTestAPI>
+      user_metrics_recorder_test_api_;
 
   // Histogram value verifier.
   base::HistogramTester histograms_;
 
   // The active SystemTrayDelegate. Not owned.
   test::TestSystemTrayDelegate* test_system_tray_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(UserMetricsRecorderTest);
 };
 
@@ skipping 137 matching lines @@
   aura::Window* unpinned_window_5 = CreateTestWindow();
   test_shelf_delegate->AddShelfItem(unpinned_window_5);
 
   user_metrics_recorder_test_api()->RecordPeriodicMetrics();
   histograms().ExpectBucketCount(kAsh_Shelf_NumberOfItems, 5, 1);
   histograms().ExpectBucketCount(kAsh_Shelf_NumberOfPinnedItems, 2, 1);
   histograms().ExpectBucketCount(kAsh_Shelf_NumberOfUnpinnedItems, 3, 1);
 }
 
 }  // namespace ash