Replace a few more std::unique_ptr.reset() with WrapUnique assignments.

testing/js_embedder_test.cpp

Index: testing/js_embedder_test.cpp
diff --git a/testing/js_embedder_test.cpp b/testing/js_embedder_test.cpp
index 125d2bff3ec2c47dbf7f8d8af0040438d2132215..a8b0d5bfcf9a417ed52045051d4fb1a894e7d746 100644
--- a/testing/js_embedder_test.cpp
+++ b/testing/js_embedder_test.cpp
@@ -21,7 +21,7 @@ void JSEmbedderTest::SetUp() {
   v8::Isolate::Scope isolate_scope(m_pIsolate);
   v8::HandleScope handle_scope(m_pIsolate);
   FXJS_PerIsolateData::SetUp(m_pIsolate);
-  m_Engine.reset(new CFXJS_Engine(m_pIsolate));
+  m_Engine = WrapUnique(new CFXJS_Engine(m_pIsolate));
   m_Engine->InitializeEngine();
 }