[Content] Update V8ValueConverter::create to return a std::unique_ptr

extensions/renderer/api_binding_test_util.cc

Index: extensions/renderer/api_binding_test_util.cc
diff --git a/extensions/renderer/api_binding_test_util.cc b/extensions/renderer/api_binding_test_util.cc
index 262ae6a7cd28a58eb0e7cfebf92689dcbb72266b..99775567241836e4a9131ea401564d095fc2aaaf 100644
--- a/extensions/renderer/api_binding_test_util.cc
+++ b/extensions/renderer/api_binding_test_util.cc
@@ -110,9 +110,7 @@ v8::Local<v8::Function> FunctionFromString(v8::Local<v8::Context> context,
 
 std::unique_ptr<base::Value> V8ToBaseValue(v8::Local<v8::Value> value,
                                            v8::Local<v8::Context> context) {
-  std::unique_ptr<content::V8ValueConverter> converter(
-      content::V8ValueConverter::create());
-  return converter->FromV8Value(value, context);
+  return content::V8ValueConverter::Create()->FromV8Value(value, context);
 }
 
 v8::Local<v8::Value> RunFunction(v8::Local<v8::Function> function,