tools/gn: Remove code for forward_dependent_configs_from variable.

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 229 matching lines @@
   if (!FillGenericDeps(variables::kDataDeps, &target_->data_deps()))
     return false;
 
   // "data_deps" was previously named "datadeps". For backwards-compat, read
   // the old one if no "data_deps" were specified.
   if (!scope_->GetValue(variables::kDataDeps, false)) {
     if (!FillGenericDeps("datadeps", &target_->data_deps()))
       return false;
   }
 
-  // This is a list of dependent targets to have their configs fowarded, so
-  // it goes here rather than in FillConfigs.
-  if (!FillForwardDependentConfigs())
-    return false;
   return true;
 }
 
 bool TargetGenerator::FillTestonly() {
   const Value* value = scope_->GetValue(variables::kTestonly, true);
   if (value) {
     if (!value->VerifyTypeIs(Value::BOOLEAN, err_))
       return false;
     target_->set_testonly(value->boolean_value());
   }
@@ skipping 88 matching lines @@
 
 bool TargetGenerator::FillGenericDeps(const char* var_name,
                                       LabelTargetVector* dest) {
   const Value* value = scope_->GetValue(var_name, true);
   if (value) {
     ExtractListOfLabels(*value, scope_->GetSourceDir(),
                         ToolchainLabelForScope(scope_), dest, err_);
   }
   return !err_->has_error();
 }
-
-bool TargetGenerator::FillForwardDependentConfigs() {
-  const Value* value = scope_->GetValue(
-      variables::kForwardDependentConfigsFrom, true);
-  if (value) {
-    ExtractListOfUniqueLabels(*value, scope_->GetSourceDir(),
-                              ToolchainLabelForScope(scope_),
-                              &target_->forward_dependent_configs(), err_);
-  }
-  return !err_->has_error();
-}