Allow .o files for GN generated inputs.

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 49 matching lines @@
   if (target->output_type() == Target::COPY_FILES) {
     NinjaCopyTargetWriter writer(target, file);
     writer.Run();
   } else if (target->output_type() == Target::ACTION ||
              target->output_type() == Target::ACTION_FOREACH) {
     NinjaActionTargetWriter writer(target, file);
     writer.Run();
   } else if (target->output_type() == Target::GROUP) {
     NinjaGroupTargetWriter writer(target, file);
     writer.Run();
-  } else if (target->output_type() == Target::EXECUTABLE ||
-             target->output_type() == Target::LOADABLE_MODULE ||
-             target->output_type() == Target::STATIC_LIBRARY ||
-             target->output_type() == Target::SHARED_LIBRARY ||
-             target->output_type() == Target::SOURCE_SET) {
+  } else if (target->IsBinary()) {
     NinjaBinaryTargetWriter writer(target, file);
     writer.Run();
   } else {
     CHECK(0) << "Output type of target not handled.";
   }
 
   std::string contents = file.str();
   base::WriteFile(ninja_file, contents.c_str(),
                   static_cast<int>(contents.size()));
 }
@@ skipping 186 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;
 }