Support more configurability in GN toolchains

tools/gn/target_generator.cc

 // Copyright (c) 2013 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/target_generator.h"
 
 #include "tools/gn/action_target_generator.h"
 #include "tools/gn/binary_target_generator.h"
 #include "tools/gn/build_settings.h"
 #include "tools/gn/config.h"
@@ skipping 246 matching lines @@
   if (pattern.ranges().empty()) {
     // Pattern is empty, error out (this prevents weirdness below).
     *err_ = Err(original_value, "This has an empty value in it.");
     return false;
   }
 
   if (pattern.ranges()[0].type == SUBSTITUTION_LITERAL) {
     // If the first thing is a literal, it must start with the output dir.
     if (!EnsureStringIsInOutputDir(
             GetBuildSettings()->build_dir(),
-            pattern.ranges()[0].literal, original_value, err_))
+            pattern.ranges()[0].literal, original_value.origin(), err_))
       return false;
   } else {
     // Otherwise, the first subrange must be a pattern that expands to
     // something in the output directory.
     if (!SubstitutionIsInOutputDir(pattern.ranges()[0].type)) {
       *err_ = Err(original_value,
           "File is not inside output directory.",
           "The given file should be in the output directory. Normally you\n"
           "would specify\n\"$target_out_dir/foo\" or "
           "\"{{source_gen_dir}}/foo\".");
@@ skipping 24 matching lines @@
 
 void TargetGenerator::FillForwardDependentConfigs() {
   const Value* value = scope_->GetValue(
       variables::kForwardDependentConfigsFrom, true);
   if (value) {
     ExtractListOfUniqueLabels(*value, scope_->GetSourceDir(),
                               ToolchainLabelForScope(scope_),
                               &target_->forward_dependent_configs(), err_);
   }
 }