Rewrite simple uses of base::ListValue::Append() taking a raw pointer var.

content/common/font_list_pango.cc

 // Copyright (c) 2011 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/common/font_list.h"
 
 #include <pango/pango.h>
 #include <pango/pangocairo.h>
 
 #include <set>
 #include <string>
+#include <utility>
 
 #include "base/values.h"
 
 namespace content {
 
 std::unique_ptr<base::ListValue> GetFontList_SlowBlocking() {
   std::unique_ptr<base::ListValue> font_list(new base::ListValue);
 
   PangoFontMap* font_map = ::pango_cairo_font_map_get_default();
   PangoFontFamily** families = NULL;
   int num_families = 0;
   ::pango_font_map_list_families(font_map, &families, &num_families);
 
   std::set<std::string> sorted_families;
   for (int i = 0; i < num_families; i++) {
     sorted_families.insert(::pango_font_family_get_name(families[i]));
   }
   g_free(families);
 
   for (std::set<std::string>::const_iterator iter = sorted_families.begin();
        iter != sorted_families.end(); ++iter) {
-    base::ListValue* font_item = new base::ListValue();
+    std::unique_ptr<base::ListValue> font_item(new base::ListValue());
     font_item->AppendString(*iter);
     font_item->AppendString(*iter);  // localized name.
     // TODO(yusukes): Support localized family names.
-    font_list->Append(font_item);
+    font_list->Append(std::move(font_item));
   }
 
   return font_list;
 }
 
 }  // namespace content