Reland of ExtensionFunction: don't pass ownership of base::Value by raw pointer.

chrome/browser/chromeos/extensions/file_manager/private_api_file_system.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 "chrome/browser/chromeos/extensions/file_manager/private_api_file_system.h"
 
 #include <sys/statvfs.h>
 
 #include <set>
 #include <utility>
@@ skipping 927 matching lines @@
     list->AppendString(
         file_manager::util::ConvertDrivePathToFileSystemUrl(
             GetProfile(), hashAndPath.path, extension_id()).spec());
   }
   SetResult(std::move(result));
   SendResponse(true);
 }
 
 ExtensionFunction::ResponseAction
 FileManagerPrivateIsUMAEnabledFunction::Run() {
-  return RespondNow(OneArgument(new base::FundamentalValue(
+  return RespondNow(OneArgument(base::MakeUnique<base::FundamentalValue>(
       ChromeMetricsServiceAccessor::IsMetricsAndCrashReportingEnabled())));
 }
 
 FileManagerPrivateInternalSetEntryTagFunction::
     FileManagerPrivateInternalSetEntryTagFunction()
     : chrome_details_(this) {}
 
 ExtensionFunction::ResponseAction
 FileManagerPrivateInternalSetEntryTagFunction::Run() {
   using extensions::api::file_manager_private_internal::SetEntryTag::Params;
@@ skipping 34 matching lines @@
   return RespondLater();
 }
 
 void FileManagerPrivateInternalSetEntryTagFunction::OnSetEntryPropertyCompleted(
     drive::FileError result) {
   Respond(result == drive::FILE_ERROR_OK ? NoArguments()
                                          : Error("Failed to set a tag."));
 }
 
 }  // namespace extensions