GN: don't write separate files for non-binary targets

tools/gn/xcode_writer.cc

 // Copyright 2016 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/xcode_writer.h"
 
 #include <iomanip>
 #include <map>
 #include <memory>
 #include <sstream>
@@ skipping 127 matching lines @@
 }
 
 }  // namespace
 
 // static
 bool XcodeWriter::RunAndWriteFiles(const std::string& workspace_name,
                                    const std::string& root_target_name,
                                    const std::string& ninja_extra_args,
                                    const std::string& dir_filters_string,
                                    const BuildSettings* build_settings,
-                                   Builder* builder,
+                                   const Builder& builder,
                                    Err* err) {
   const XcodeWriter::TargetOsType target_os =
       GetTargetOs(build_settings->build_args());
 
   PBXAttributes attributes;
   switch (target_os) {
     case XcodeWriter::WRITER_TARGET_OS_IOS:
       attributes["SDKROOT"] = "iphoneos";
       attributes["TARGETED_DEVICE_FAMILY"] = "1,2";
       break;
@@ skipping 14 matching lines @@
                                 .StripTrailingSeparators()
                                 .BaseName()
                                 .AsUTF8Unsafe();
   DCHECK(!config_name.empty());
 
   std::string::size_type separator = config_name.find('-');
   if (separator != std::string::npos)
     config_name = config_name.substr(0, separator);
 
   std::vector<const Target*> targets;
-  std::vector<const Target*> all_targets = builder->GetAllResolvedTargets();
+  std::vector<const Target*> all_targets = builder.GetAllResolvedTargets();
   if (!XcodeWriter::FilterTargets(build_settings, all_targets,
                                   dir_filters_string, &targets, err)) {
     return false;
   }
 
   XcodeWriter workspace(workspace_name);
   workspace.CreateProductsProject(targets, attributes, source_path, config_name,
                                   root_target_name, ninja_extra_args,
                                   build_settings, target_os);
 
@@ skipping 228 matching lines @@
     for (auto* object : pair.second) {
       object->Print(out, 2);
     }
     out << "/* End " << ToString(pair.first) << " section */\n";
   }
 
   out << "\t};\n"
       << "\trootObject = " << project->Reference() << ";\n"
       << "}\n";
 }