Add public deps to GN

tools/gn/function_toolchain.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 <algorithm>
 #include <limits>
 
 #include "tools/gn/err.h"
 #include "tools/gn/functions.h"
 #include "tools/gn/parse_tree.h"
@@ skipping 231 matching lines @@
     "    current build.\n"
     "\n"
     "Invoking targets in toolchains:\n"
     "\n"
     "  By default, when a target depends on another, there is an implicit\n"
     "  toolchain label that is inherited, so the dependee has the same one\n"
     "  as the dependent.\n"
     "\n"
     "  You can override this and refer to any other toolchain by explicitly\n"
     "  labeling the toolchain to use. For example:\n"
-    "    datadeps = [ \"//plugins:mine(//toolchains:plugin_toolchain)\" ]\n"
+    "    data_deps = [ \"//plugins:mine(//toolchains:plugin_toolchain)\" ]\n"
     "  The string \"//build/toolchains:plugin_toolchain\" is a label that\n"
     "  identifies the toolchain declaration for compiling the sources.\n"
     "\n"
     "  To load a file in an alternate toolchain, GN does the following:\n"
     "\n"
     "   1. Loads the file with the toolchain definition in it (as determined\n"
     "      by the toolchain label).\n"
     "   2. Re-runs the master build configuration file, applying the\n"
     "      arguments specified by the toolchain_args section of the toolchain\n"
     "      definition (see \"gn help toolchain_args\").\n"
@@ skipping 650 matching lines @@
     return Value();
 
   Scope::KeyValueMap values;
   block_scope.GetCurrentScopeValues(&values);
   toolchain->args() = values;
 
   return Value();
 }
 
 }  // namespace functions