tools/gn: Change auto to not deduce raw pointers.

tools/gn/ninja_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_target_writer.h"
 
 #include <sstream>
 
 #include "base/files/file_util.h"
 #include "base/strings/string_util.h"
@@ skipping 237 matching lines @@
     out_ << " ";
     path_output_.WriteFile(out_, *source);
   }
 
   // Target input deps. Sort by label so the output is deterministic (otherwise
   // some of the targets will have gone through std::sets which will have
   // sorted them by pointer).
   std::sort(
       input_deps_targets.begin(), input_deps_targets.end(),
       [](const Target* a, const Target* b) { return a->label() < b->label(); });
-  for (const auto& dep : input_deps_targets) {
+  for (auto* dep : input_deps_targets) {
     DCHECK(!dep->dependency_output_file().value().empty());
     out_ << " ";
     path_output_.WriteFile(out_, dep->dependency_output_file());
   }
 
   out_ << "\n";
   return input_stamp_file;
 }
 
 void NinjaTargetWriter::WriteStampForTarget(
@@ skipping 15 matching lines @@
        << GetNinjaRulePrefixForToolchain(settings_)
        << Toolchain::ToolTypeToName(Toolchain::TYPE_STAMP);
   path_output_.WriteFiles(out_, files);
 
   if (!order_only_deps.empty()) {
     out_ << " ||";
     path_output_.WriteFiles(out_, order_only_deps);
   }
   out_ << std::endl;
 }