make gn label unit tests pass again

tools/gn/label.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/label.h"
 
 #include "base/logging.h"
 #include "tools/gn/err.h"
 #include "tools/gn/parse_tree.h"
 #include "tools/gn/value.h"
@@ skipping 11 matching lines @@
 
 // Given the separate-out input (everything before the colon) in the dep rule,
 // computes the final build rule. Sets err on failure. On success,
 // |*used_implicit| will be set to whether the implicit current directory was
 // used. The value is used only for generating error messages.
 bool ComputeBuildLocationFromDep(const Value& input_value,
                                  const SourceDir& current_dir,
                                  const base::StringPiece& input,
                                  SourceDir* result,
                                  Err* err) {
-  // No rule, use the current locaton.
+  // No rule, use the current location.
   if (input.empty()) {
     *result = current_dir;
     return true;
   }
 
   *result = current_dir.ResolveRelativeDir(input);
   return true;
 }
 
 // Given the separated-out target name (after the colon) computes the final
@@ skipping 210 matching lines @@
   }
   return ret;
 }
 
 std::string Label::GetUserVisibleName(const Label& default_toolchain) const {
   bool include_toolchain =
       default_toolchain.dir() != toolchain_dir_ ||
       default_toolchain.name() != toolchain_name_;
   return GetUserVisibleName(include_toolchain);
 }