Make get_label_info take into account the toolchain for target_gen_dir

tools/gn/ninja_binary_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_binary_target_writer.h"
 
 #include <stddef.h>
 #include <string.h>
 
 #include <cstring>
@@ skipping 399 matching lines @@
 
   if (target_->inputs().size() == 0)
     return OutputFile();  // No inputs
 
   // If we only have one input, return it directly instead of writing a stamp
   // file for it.
   if (target_->inputs().size() == 1)
     return OutputFile(settings_->build_settings(), target_->inputs()[0]);
 
   // Make a stamp file.
-  OutputFile input_stamp_file(
-      RebasePath(GetTargetOutputDir(target_).value(),
-                 settings_->build_settings()->build_dir(),
-                 settings_->build_settings()->root_path_utf8()));
+  OutputFile input_stamp_file =
+      GetBuildDirForTargetAsOutputFile(target_, BuildDirType::OBJ);
   input_stamp_file.value().append(target_->label().name());
   input_stamp_file.value().append(".inputs.stamp");
 
   out_ << "build ";
   path_output_.WriteFile(out_, input_stamp_file);
   out_ << ": "
        << GetNinjaRulePrefixForToolchain(settings_)
        << Toolchain::ToolTypeToName(Toolchain::TYPE_STAMP);
 
   // File inputs.
@@ skipping 598 matching lines @@
       out_ << " ";
       path_output_.WriteFile(out_, non_linkable_dep->dependency_output_file());
     }
   }
 }
 
 OutputFile NinjaBinaryTargetWriter::GetWindowsPCHFile(
     Toolchain::ToolType tool_type) const {
   // Use "obj/{dir}/{target_name}_{lang}.pch" which ends up
   // looking like "obj/chrome/browser/browser_cc.pch"
-  OutputFile ret = GetTargetOutputDirAsOutputFile(target_);
+  OutputFile ret = GetBuildDirForTargetAsOutputFile(target_, BuildDirType::OBJ);
   ret.value().append(target_->label().name());
   ret.value().push_back('_');
   ret.value().append(GetPCHLangSuffixForToolType(tool_type));
   ret.value().append(".pch");
 
   return ret;
 }
 
 bool NinjaBinaryTargetWriter::CheckForDuplicateObjectFiles(
     const std::vector<OutputFile>& files) const {
@@ skipping 14 matching lines @@
           "\n"
           "In the latter case, either rename one of the files or move one of\n"
           "the sources to a separate source_set to avoid them both being in\n"
           "the same target.");
       g_scheduler->FailWithError(err);
       return false;
     }
   }
   return true;
 }