Re-write many calls to WrapUnique() with MakeUnique()

ui/app_list/search/mixer_unittest.cc

Index: ui/app_list/search/mixer_unittest.cc
diff --git a/ui/app_list/search/mixer_unittest.cc b/ui/app_list/search/mixer_unittest.cc
index 4e79bf341f74d995173f7cc1e90e4a98c7836d64..084c5799622885379c6ed800dc27d384f36c7de7 100644
--- a/ui/app_list/search/mixer_unittest.cc
+++ b/ui/app_list/search/mixer_unittest.cc
@@ -46,7 +46,7 @@ class TestSearchResult : public SearchResult {
   void Open(int event_flags) override {}
   void InvokeAction(int action_index, int event_flags) override {}
   std::unique_ptr<SearchResult> Duplicate() const override {
-    return base::WrapUnique(new TestSearchResult(id(), relevance()));
+    return base::MakeUnique<TestSearchResult>(id(), relevance());
   }
 
   // For reference equality testing. (Addresses cannot be used to test reference