Add support for Mac/iOS application bundles to GN tool.

tools/gn/commands.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/commands.h"
 
 #include "base/command_line.h"
 #include "tools/gn/builder.h"
 #include "tools/gn/filesystem_utils.h"
 #include "tools/gn/item.h"
@@ skipping 188 matching lines @@
     return true;
   }
   if (value == "source_set") {
     *type = Target::SOURCE_SET;
     return true;
   }
   if (value == "copy") {
     *type = Target::COPY_FILES;
     return true;
   }
+  if (value == "copy_bundle_data") {
+    *type = Target::COPY_BUNDLE_DATA;
+    return true;
+  }
   if (value == "action") {
     *type = Target::ACTION;
     return true;
   }
 
   Err(Location(), "Invalid value for \"--type\".").PrintToStdout();
   return false;
 }
 
 
@@ skipping 274 matching lines @@
   }
 }
 
 void FilterAndPrintTargetSet(bool indent,
                              const std::set<const Target*>& targets) {
   std::vector<const Target*> target_vector(targets.begin(), targets.end());
   FilterAndPrintTargets(indent, &target_vector);
 }
 
 }  // namespace commands