Update SupportsUserData uses with unique_ptr.

chrome/browser/page_load_metrics/observers/delay_navigation_page_load_metrics_observer_unittest.cc

 // Copyright 2017 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 "chrome/browser/page_load_metrics/observers/delay_navigation_page_load_metrics_observer.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
@@ skipping 57 matching lines @@
     InjectDelayNavigationThrottleWebContentsObserver);
 
 void InjectDelayNavigationThrottleWebContentsObserver::CreateForWebContents(
     content::WebContents* web_contents,
     scoped_refptr<base::TestMockTimeTaskRunner> mock_time_task_runner) {
   InjectDelayNavigationThrottleWebContentsObserver* metrics =
       FromWebContents(web_contents);
   if (!metrics) {
     metrics = new InjectDelayNavigationThrottleWebContentsObserver(
         web_contents, mock_time_task_runner);
-    web_contents->SetUserData(UserDataKey(), metrics);
+    web_contents->SetUserData(UserDataKey(), base::WrapUnique(metrics));
   }
 }
 
 class DelayNavigationPageLoadMetricsObserverTest
     : public page_load_metrics::PageLoadMetricsObserverTestHarness {
  public:
   void RegisterObservers(page_load_metrics::PageLoadTracker* tracker) override {
     tracker->AddObserver(
         base::MakeUnique<DelayNavigationPageLoadMetricsObserver>());
   }
@@ skipping 58 matching lines @@
   histogram_tester().ExpectTotalCount(
       internal::kHistogramNavigationDelaySpecified, 1);
   histogram_tester().ExpectBucketCount(
       internal::kHistogramNavigationDelaySpecified, kDelayMillis, 1);
 
   histogram_tester().ExpectTotalCount(internal::kHistogramNavigationDelayActual,
                                       1);
   histogram_tester().ExpectTotalCount(internal::kHistogramNavigationDelayDelta,
                                       1);
 }