GN threading refactor

tools/gn/script_target_generator.cc

Index: tools/gn/script_target_generator.cc
diff --git a/tools/gn/script_target_generator.cc b/tools/gn/script_target_generator.cc
index 272061c488be588e66ae98043c974c6ff80c323f..8f414f4956471fc050ef9a6efbbbf6fa0111d04b 100644
--- a/tools/gn/script_target_generator.cc
+++ b/tools/gn/script_target_generator.cc
@@ -7,16 +7,18 @@
 #include "tools/gn/build_settings.h"
 #include "tools/gn/err.h"
 #include "tools/gn/filesystem_utils.h"
+#include "tools/gn/parse_tree.h"
 #include "tools/gn/scope.h"
 #include "tools/gn/value.h"
 #include "tools/gn/value_extractors.h"
 #include "tools/gn/variables.h"
 
-ScriptTargetGenerator::ScriptTargetGenerator(Target* target,
-                                             Scope* scope,
-                                             const Token& function_token,
-                                             Err* err)
-    : TargetGenerator(target, scope, function_token, err) {
+ScriptTargetGenerator::ScriptTargetGenerator(
+    Target* target,
+    Scope* scope,
+    const FunctionCallNode* function_call,
+    Err* err)
+    : TargetGenerator(target, scope, function_call, err) {
 }
 
 ScriptTargetGenerator::~ScriptTargetGenerator() {
@@ -62,7 +64,7 @@ void ScriptTargetGenerator::FillScript() {
   // if it doesn't have one.
   const Value* value = scope_->GetValue(variables::kScript, true);
   if (!value) {
-    *err_ = Err(function_token_, "This target type requires a \"script\".");
+    *err_ = Err(function_call_, "This target type requires a \"script\".");
     return;
   }
   if (!value->VerifyTypeIs(Value::STRING, err_))