Convert GN's deps iterator to work with range-based for loops.

tools/gn/ninja_group_target_writer.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/ninja_group_target_writer.h"
 
 #include "base/strings/string_util.h"
 #include "tools/gn/deps_iterator.h"
 #include "tools/gn/output_file.h"
 #include "tools/gn/string_utils.h"
 #include "tools/gn/target.h"
 
 NinjaGroupTargetWriter::NinjaGroupTargetWriter(const Target* target,
                                                std::ostream& out)
     : NinjaTargetWriter(target, out) {
 }
 
 NinjaGroupTargetWriter::~NinjaGroupTargetWriter() {
 }
 
 void NinjaGroupTargetWriter::Run() {
   // A group rule just generates a stamp file with dependencies on each of
   // the deps and data_deps in the group.
   std::vector<OutputFile> output_files;
-  for (DepsIterator iter(target_, DepsIterator::LINKED_ONLY);
-       !iter.done(); iter.Advance())
-    output_files.push_back(iter.target()->dependency_output_file());
+  for (const auto& pair : target_->GetDeps(Target::DEPS_LINKED))
+    output_files.push_back(pair.ptr->dependency_output_file());
 
   std::vector<OutputFile> data_output_files;
   const LabelTargetVector& data_deps = target_->data_deps();
-  for (size_t i = 0; i < data_deps.size(); i++)
-    data_output_files.push_back(data_deps[i].ptr->dependency_output_file());
+  for (const auto& pair : data_deps)
+    data_output_files.push_back(pair.ptr->dependency_output_file());
 
   WriteStampForTarget(output_files, data_output_files);
 }