Add "create_bundle" target in order to support bundle with gn.

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"
 #include "tools/gn/err.h"
 #include "tools/gn/escape.h"
 #include "tools/gn/filesystem_utils.h"
 #include "tools/gn/ninja_action_target_writer.h"
 #include "tools/gn/ninja_binary_target_writer.h"
 #include "tools/gn/ninja_bundle_data_target_writer.h"
 #include "tools/gn/ninja_copy_target_writer.h"
+#include "tools/gn/ninja_create_bundle_target_writer.h"
 #include "tools/gn/ninja_group_target_writer.h"
 #include "tools/gn/ninja_utils.h"
 #include "tools/gn/output_file.h"
 #include "tools/gn/scheduler.h"
 #include "tools/gn/string_utils.h"
 #include "tools/gn/substitution_writer.h"
 #include "tools/gn/target.h"
 #include "tools/gn/trace.h"
 
 NinjaTargetWriter::NinjaTargetWriter(const Target* target,
@@ skipping 26 matching lines @@
   base::CreateDirectory(ninja_file.DirName());
 
   // It's ridiculously faster to write to a string and then write that to
   // disk in one operation than to use an fstream here.
   std::stringstream file;
 
   // Call out to the correct sub-type of writer.
   if (target->output_type() == Target::BUNDLE_DATA) {
     NinjaBundleDataTargetWriter writer(target, file);
     writer.Run();
+  } else if (target->output_type() == Target::CREATE_BUNDLE) {
+    NinjaCreateBundleTargetWriter writer(target, file);
+    writer.Run();
   } else 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();
@@ skipping 202 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;
 }