🐜 GN: Make write_runtime_deps take effect only a target is resolved

tools/gn/test_with_scope.cc

Index: tools/gn/test_with_scope.cc
diff --git a/tools/gn/test_with_scope.cc b/tools/gn/test_with_scope.cc
index 32d5dd675850bcf54886b0289b086360306a655b..0ddd4636be4299de4a1972edf7214bbdc45f7046 100644
--- a/tools/gn/test_with_scope.cc
+++ b/tools/gn/test_with_scope.cc
@@ -24,6 +24,7 @@ TestWithScope::TestWithScope()
   settings_.set_default_toolchain_label(toolchain_.label());
 
   SetupToolchain(&toolchain_);
+  scope_.set_item_collector(&items_);
 }
 
 TestWithScope::~TestWithScope() {
@@ -37,6 +38,28 @@ Label TestWithScope::ParseLabel(const std::string& str) const {
   return result;
 }
 
+bool TestWithScope::ExecuteSnippet(const std::string& str, Err* err) {
+  TestParseInput input(str);
+  if (input.has_error()) {
+    *err = input.parse_err();
+    return false;
+  }
+
+  size_t first_item = items_.size();
+  input.parsed()->Execute(&scope_, err);
+  if (err->has_error())
+    return false;
+
+  for (size_t i = first_item; i < items_.size(); ++i) {
+    CHECK(items_[i]->AsTarget() != nullptr)
+        << "Only targets are supported in ExecuteSnippet()";
+    items_[i]->AsTarget()->SetToolchain(&toolchain_);
+    if (!items_[i]->OnResolved(err))
+      return false;
+  }
+  return true;
+}
+
 // static
 void TestWithScope::SetupToolchain(Toolchain* toolchain) {
   Err err;