gn: Allow users to set 'check_includes' in action_foreach().

tools/gn/binary_target_generator.cc

Index: tools/gn/binary_target_generator.cc
diff --git a/tools/gn/binary_target_generator.cc b/tools/gn/binary_target_generator.cc
index deee2161b58bfe89fa8652cce05c7a5b06305c06..923d0edd7a95f37ac66538e62a67cefcf68aac52 100644
--- a/tools/gn/binary_target_generator.cc
+++ b/tools/gn/binary_target_generator.cc
@@ -63,16 +63,6 @@ void BinaryTargetGenerator::DoRun() {
     return;
 }
 
-bool BinaryTargetGenerator::FillCheckIncludes() {
-  const Value* value = scope_->GetValue(variables::kCheckIncludes, true);
-  if (!value)
-    return true;
-  if (!value->VerifyTypeIs(Value::BOOLEAN, err_))
-    return false;
-  target_->set_check_includes(value->boolean_value());
-  return true;
-}
-
 bool BinaryTargetGenerator::FillCompleteStaticLib() {
   if (target_->output_type() == Target::STATIC_LIBRARY) {
     const Value* value = scope_->GetValue(variables::kCompleteStaticLib, true);