Minor fixes to tools/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 <utility>
 
 #include "tools/gn/err.h"
 #include "tools/gn/functions.h"
@@ skipping 798 matching lines @@
   if (IsCompilerTool(tool_type)) {
     subst_validator = &IsValidCompilerSubstitution;
     subst_output_validator = &IsValidCompilerOutputsSubstitution;
   } else if (IsLinkerTool(tool_type)) {
     subst_validator = &IsValidLinkerSubstitution;
     subst_output_validator = &IsValidLinkerOutputsSubstitution;
   } else if (tool_type == Toolchain::TYPE_COPY) {
     subst_validator = &IsValidCopySubstitution;
     subst_output_validator = &IsValidCopySubstitution;
   } else {
-    subst_validator = &IsValidToolSubstutition;
-    subst_output_validator = &IsValidToolSubstutition;
+    subst_validator = &IsValidToolSubstitution;
+    subst_output_validator = &IsValidToolSubstitution;
   }
 
   scoped_ptr<Tool> tool(new Tool);
 
   if (!ReadPattern(&block_scope, "command", subst_validator, tool.get(),
                    &Tool::set_command, err) ||
       !ReadOutputExtension(&block_scope, tool.get(), err) ||
       !ReadPattern(&block_scope, "depfile", subst_validator, tool.get(),
                    &Tool::set_depfile, err) ||
       !ReadDepsFormat(&block_scope, tool.get(), err) ||
@@ skipping 155 matching lines @@
     return Value();
 
   Scope::KeyValueMap values;
   block_scope.GetCurrentScopeValues(&values);
   toolchain->args() = values;
 
   return Value();
 }
 
 }  // namespace functions