Implement new Function.prototype.toString and fix CreateDynamicFunction parsing

test/cctest/wasm/test-wasm-breakpoints.cc

Index: test/cctest/wasm/test-wasm-breakpoints.cc
diff --git a/test/cctest/wasm/test-wasm-breakpoints.cc b/test/cctest/wasm/test-wasm-breakpoints.cc
index b38d1bce67721c89f93e43eb9d7bc83dacd33ad8..d23f2551ca2aea9088863f266b9705b4a82087a5 100644
--- a/test/cctest/wasm/test-wasm-breakpoints.cc
+++ b/test/cctest/wasm/test-wasm-breakpoints.cc
@@ -138,7 +138,8 @@ Handle<JSObject> MakeFakeBreakpoint(Isolate* isolate, int position) {
   Handle<String> source = isolate->factory()->NewStringFromStaticChars("true");
   Handle<Context> context(isolate->context(), isolate);
   Handle<JSFunction> triggered_fun =
-      Compiler::GetFunctionFromString(context, source, NO_PARSE_RESTRICTION)
+      Compiler::GetFunctionFromString(context, source, NO_PARSE_RESTRICTION,
+                                      kNoSourcePosition)
           .ToHandleChecked();
   PropertyDescriptor desc;
   desc.set_value(triggered_fun);