adapt stringToPersistedFunction to compileFunction

This is just a thin wrapper around it now.

src/browser/js/Local.zig

@@ -118,16 +118,27 @@ pub fn exec(self: *const Local, src: []const u8, name: ?[]const u8) !js.Value {
 /// Compiles a function body as function.
 ///
 /// https://v8.github.io/api/head/classv8_1_1ScriptCompiler.html#a3a15bb5a7dfc3f998e6ac789e6b4646a
-pub fn compileFunction(self: *const Local, function_body: []const u8) !js.Function {
+pub fn compileFunction(
+    self: *const Local,
+    function_body: []const u8,
+    /// We tend to know how many params we'll pass; can remove the comptime if necessary.
+    comptime parameter_names: []const []const u8,
+    extensions: []const v8.Object,
+) !js.Function {
     // TODO: Make configurable.
     const script_name = self.isolate.initStringHandle("anonymous");
     const script_source = self.isolate.initStringHandle(function_body);
 
-    // Create ScriptOrigin.
+    var parameter_list: [parameter_names.len]*const v8.String = undefined;
+    inline for (0..parameter_names.len) |i| {
+        parameter_list[i] = self.isolate.initStringHandle(parameter_names[i]);
+    }
+
+    // Create `ScriptOrigin`.
     var origin: v8.ScriptOrigin = undefined;
     v8.v8__ScriptOrigin__CONSTRUCT(&origin, script_name);
 
-    // Create ScriptCompilerSource.
+    // Create `ScriptCompilerSource`.
     var script_compiler_source: v8.ScriptCompilerSource = undefined;
     v8.v8__ScriptCompiler__Source__CONSTRUCT2(script_source, &origin, null, &script_compiler_source);
     defer v8.v8__ScriptCompiler__Source__DESTRUCT(&script_compiler_source);
@@ -136,10 +147,10 @@ pub fn compileFunction(self: *const Local, function_body: []const u8) !js.Functi
     const result = v8.v8__ScriptCompiler__CompileFunction(
         self.handle,
         &script_compiler_source,
-        0,
-        null,
-        0,
-        null,
+        parameter_list.len,
+        &parameter_list,
+        extensions.len,
+        @ptrCast(&extensions),
         v8.kNoCompileOptions,
         v8.kNoCacheNoReason,
     ) orelse return error.CompilationError;