Fix GN action target writing with no sources list.

tools/gn/function_get_target_outputs.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "tools/gn/build_settings.h"
 #include "tools/gn/functions.h"
 #include "tools/gn/ninja_helper.h"
 #include "tools/gn/parse_tree.h"
 #include "tools/gn/settings.h"
 #include "tools/gn/substitution_writer.h"
 #include "tools/gn/target.h"
 #include "tools/gn/value.h"
 
 namespace functions {
 
 namespace {
 
 void GetOutputsForTarget(const Settings* settings,
                          const Target* target,
                          std::vector<SourceFile>* ret) {
   switch (target->output_type()) {
     case Target::ACTION: {
-      // Actions just use the output list with no substitution. To keep things
-      // simple, pass an empty "source file" in to use the same code path for
-      // computing substitution outputs.
+      // Actions just use the output list with no substitution.
       std::vector<SourceFile> sources;
       sources.push_back(SourceFile());
-      SubstitutionWriter::ApplyListToSources(
-          settings, target->action_values().outputs(), sources, ret);
+      SubstitutionWriter::GetListAsSourceFiles(
+          settings, target->action_values().outputs(), ret);
       break;
     }
 
     case Target::COPY_FILES:
     case Target::ACTION_FOREACH:
       SubstitutionWriter::ApplyListToSources(
           settings, target->action_values().outputs(), target->sources(), ret);
       break;
 
     case Target::EXECUTABLE:
@@ skipping 129 matching lines @@
 
   Value ret(function, Value::LIST);
   ret.list_value().reserve(files.size());
   for (size_t i = 0; i < files.size(); i++)
     ret.list_value().push_back(Value(function, files[i].value()));
 
   return ret;
 }
 
 }  // namespace functions