Convert the rest of the functions in core.cc to use CreateFunctionTemplate.

gin/runner_unittest.cc

Index: gin/runner_unittest.cc
diff --git a/gin/runner_unittest.cc b/gin/runner_unittest.cc
index 9493cf1e181e13bf03cf03938599f1a3326e50a0..3723956df6a4ecdcf2a0aa611eb62f7b85828410 100644
--- a/gin/runner_unittest.cc
+++ b/gin/runner_unittest.cc
@@ -28,7 +28,7 @@ TEST(RunnerTest, Run) {
   runner.Run(source, "test_data.js");
 
   std::string result;
-  EXPECT_TRUE(Converter<std::string>::FromV8(
+  EXPECT_TRUE(Converter<std::string>::FromV8(isolate,
       runner.global()->Get(StringToV8(isolate, "result")),
       &result));
   EXPECT_EQ("PASS", result);