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

tools/gn/target_generator.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/target_generator.h"
 
 #include <stddef.h>
 
 #include "tools/gn/action_target_generator.h"
 #include "tools/gn/binary_target_generator.h"
 #include "tools/gn/build_settings.h"
 #include "tools/gn/bundle_data_target_generator.h"
 #include "tools/gn/config.h"
 #include "tools/gn/copy_target_generator.h"
+#include "tools/gn/create_bundle_target_generator.h"
 #include "tools/gn/err.h"
 #include "tools/gn/filesystem_utils.h"
 #include "tools/gn/functions.h"
 #include "tools/gn/group_target_generator.h"
 #include "tools/gn/parse_tree.h"
 #include "tools/gn/scheduler.h"
 #include "tools/gn/scope.h"
 #include "tools/gn/token.h"
 #include "tools/gn/value.h"
 #include "tools/gn/value_extractors.h"
@@ skipping 60 matching lines @@
     g_scheduler->Log("Defining target", label.GetUserVisibleName(true));
 
   scoped_ptr<Target> target(new Target(scope->settings(), label));
   target->set_defined_from(function_call);
 
   // Create and call out to the proper generator.
   if (output_type == functions::kBundleData) {
     BundleDataTargetGenerator generator(
         target.get(), scope, function_call, err);
     generator.Run();
+  } else if (output_type == functions::kCreateBundle) {
+    CreateBundleTargetGenerator generator(
+        target.get(), scope, function_call, err);
+    generator.Run();
   } else if (output_type == functions::kCopy) {
     CopyTargetGenerator generator(target.get(), scope, function_call, err);
     generator.Run();
   } else if (output_type == functions::kAction) {
     ActionTargetGenerator generator(target.get(), scope, function_call,
                                     Target::ACTION, err);
     generator.Run();
   } else if (output_type == functions::kActionForEach) {
     ActionTargetGenerator generator(target.get(), scope, function_call,
                                     Target::ACTION_FOREACH, err);
@@ skipping 266 matching lines @@
 
 bool TargetGenerator::FillGenericDeps(const char* var_name,
                                       LabelTargetVector* dest) {
   const Value* value = scope_->GetValue(var_name, true);
   if (value) {
     ExtractListOfLabels(*value, scope_->GetSourceDir(),
                         ToolchainLabelForScope(scope_), dest, err_);
   }
   return !err_->has_error();
 }