Update SupportsUserData uses with unique_ptr.

content/browser/browser_context.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 "content/public/browser/browser_context.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 208 matching lines @@
   // unittests where a UI thread might not have been created.
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) ||
          !BrowserThread::IsMessageLoopValid(BrowserThread::UI));
 
 #if defined(OS_CHROMEOS)
   if (!context->GetUserData(kMountPointsKey)) {
     scoped_refptr<storage::ExternalMountPoints> mount_points =
         storage::ExternalMountPoints::CreateRefCounted();
     context->SetUserData(
         kMountPointsKey,
-        new UserDataAdapter<storage::ExternalMountPoints>(mount_points.get()));
+        base::MakeUnique<UserDataAdapter<storage::ExternalMountPoints>>(
+            mount_points.get()));
   }
 
   return UserDataAdapter<storage::ExternalMountPoints>::Get(context,
                                                             kMountPointsKey);
 #else
   return NULL;
 #endif
 }
 
 // static
@@ skipping 324 matching lines @@
   base::Base64Encode(base::RandBytesAsString(16), &salt);
   DCHECK(!salt.empty());
   return salt;
 }
 
 BrowsingDataRemoverDelegate* BrowserContext::GetBrowsingDataRemoverDelegate() {
   return nullptr;
 }
 
 }  // namespace content