[Mac/iOS/GN] Document the new rules for create_bundle and runtime_deps.

tools/gn/variables.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/variables.h"
 
 namespace variables {
 
 // Built-in variables ----------------------------------------------------------
 
@@ skipping 794 matching lines @@
     "  GN doesn't require data files to exist at build-time. So actions that\n"
     "  produce files that are in turn runtime dependencies can list those\n"
     "  generated files both in the \"outputs\" list as well as the \"data\"\n"
     "  list.\n"
     "\n"
     "  By convention, directories are listed with a trailing slash:\n"
     "    data = [ \"test/data/\" ]\n"
     "  However, no verification is done on these so GN doesn't enforce this.\n"
     "  The paths are just rebased and passed along when requested.\n"
     "\n"
+    "  Note: On iOS and OS X, create_bundle targets will not be recursed\n"
+    "  into when gathering data. See \"gn help create_bundle\" for details.\n"
+    "\n"
     "  See \"gn help runtime_deps\" for how these are used.\n";
 
 const char kDataDeps[] = "data_deps";
 const char kDataDeps_HelpShort[] =
     "data_deps: [label list] Non-linked dependencies.";
 const char kDataDeps_Help[] =
     "data_deps: Non-linked dependencies.\n"
     "\n"
     "  A list of target labels.\n"
     "\n"
     "  Specifies dependencies of a target that are not actually linked into\n"
     "  the current target. Such dependencies will be built and will be\n"
     "  available at runtime.\n"
     "\n"
     "  This is normally used for things like plugins or helper programs that\n"
     "  a target needs at runtime.\n"
     "\n"
+    "  Note: On iOS and OS X, create_bundle targets will not be recursed\n"
+    "  into when gathering data_deps. See \"gn help create_bundle\" for\n"
+    "  details.\n"
+    "\n"
     "  See also \"gn help deps\" and \"gn help data\".\n"
     "\n"
     "Example\n"
     "\n"
     "  executable(\"foo\") {\n"
     "    deps = [ \"//base\" ]\n"
     "    data_deps = [ \"//plugins:my_runtime_plugin\" ]\n"
     "  }\n";
 
 const char kDefines[] = "defines";
@@ skipping 879 matching lines @@
     INSERT_VARIABLE(Testonly)
     INSERT_VARIABLE(Visibility)
     INSERT_VARIABLE(WriteRuntimeDeps)
   }
   return info_map;
 }
 
 #undef INSERT_VARIABLE
 
 }  // namespace variables