Convert //chrome/browser/extensions from scoped_ptr to std::unique_ptr

chrome/browser/extensions/api/top_sites/top_sites_apitest.cc

Index: chrome/browser/extensions/api/top_sites/top_sites_apitest.cc
diff --git a/chrome/browser/extensions/api/top_sites/top_sites_apitest.cc b/chrome/browser/extensions/api/top_sites/top_sites_apitest.cc
index 7561fadaf167f2f01b82b1aae3450c218098ac0a..f44d84b8f8f9855f9d88f72b461e3a5bdec3a1b5 100644
--- a/chrome/browser/extensions/api/top_sites/top_sites_apitest.cc
+++ b/chrome/browser/extensions/api/top_sites/top_sites_apitest.cc
@@ -74,7 +74,7 @@ IN_PROC_BROWSER_TEST_F(TopSitesExtensionTest, GetTopSites) {
   // Without a callback the function will not generate a result.
   get_top_sites_function->set_has_callback(true);
 
-  scoped_ptr<base::Value> result(utils::RunFunctionAndReturnSingleResult(
+  std::unique_ptr<base::Value> result(utils::RunFunctionAndReturnSingleResult(
       get_top_sites_function.get(), "[]", browser()));
   base::ListValue* list;
   ASSERT_TRUE(result->GetAsList(&list));