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

tools/gn/command_desc.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 <stddef.h>
 
 #include <algorithm>
 #include <set>
 #include <sstream>
 
@@ skipping 309 matching lines @@
 
 void PrintOutputs(const Target* target, bool display_header) {
   if (display_header)
     OutputString("\noutputs:\n");
 
   if (target->output_type() == Target::ACTION) {
     // Action, print out outputs, don't apply sources to it.
     for (const auto& elem : target->action_values().outputs().list()) {
       OutputString("  " + elem.AsString() + "\n");
     }
+  } else if (target->output_type() == Target::CREATE_BUNDLE) {
+    std::vector<SourceFile> output_files;
+    target->bundle_data().GetOutputsAsSourceFiles(target->settings(),
+                                                  &output_files);
+    PrintFileList(output_files, "", true, false);
   } else {
     const SubstitutionList& outputs = target->action_values().outputs();
     if (!outputs.required_types().empty()) {
       // Display the pattern and resolved pattern separately, since there are
       // subtitutions used.
       OutputString("  Output pattern:\n");
       for (const auto& elem : outputs.list())
         OutputString("    " + elem.AsString() + "\n");
 
       // Now display what that resolves to given the sources.
@@ skipping 338 matching lines @@
   }
 
   // Display summary.
 
   // Display this only applicable to binary targets.
   bool is_binary_output =
     target->output_type() != Target::GROUP &&
     target->output_type() != Target::COPY_FILES &&
     target->output_type() != Target::ACTION &&
     target->output_type() != Target::ACTION_FOREACH &&
-    target->output_type() != Target::BUNDLE_DATA;
+    target->output_type() != Target::BUNDLE_DATA &&
+    target->output_type() != Target::CREATE_BUNDLE;
 
   // Generally we only want to display toolchains on labels when the toolchain
   // is different than the default one for this target (which we always print
   // in the header).
   Label target_toolchain = target->label().GetToolchainLabel();
 
   // Header.
   OutputString("Target: ", DECORATION_YELLOW);
   OutputString(target->label().GetUserVisibleName(false) + "\n");
   OutputString("Type: ", DECORATION_YELLOW);
@@ skipping 33 matching lines @@
 
   if (target->output_type() == Target::ACTION ||
       target->output_type() == Target::ACTION_FOREACH) {
     PrintScript(target, true);
     PrintArgs(target, true);
     PrintDepfile(target, true);
   }
 
   if (target->output_type() == Target::ACTION ||
       target->output_type() == Target::ACTION_FOREACH ||
-      target->output_type() == Target::COPY_FILES) {
+      target->output_type() == Target::COPY_FILES ||
+      target->output_type() == Target::CREATE_BUNDLE) {
     PrintOutputs(target, true);
   }
 
   // Libs can be part of any target and get recursively pushed up the chain,
   // so always display them, even for groups and such.
   PrintLibs(target, true);
   PrintLibDirs(target, true);
 
   PrintDeps(target, true);
 
   return 0;
 }
 
 }  // namespace commands