Improve GN handling of directory templates.

tools/gn/function_write_file.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 <iostream>
 #include <sstream>
 
 #include "base/file_util.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
@@ skipping 42 matching lines @@
     return Value();
   }
 
   // Compute the file name and make sure it's in the output dir.
   if (!args[0].VerifyTypeIs(Value::STRING, err))
     return Value();
   const SourceDir& cur_dir = scope->GetSourceDir();
   SourceFile source_file = cur_dir.ResolveRelativeFile(args[0].string_value());
   if (!EnsureStringIsInOutputDir(
           scope->settings()->build_settings()->build_dir(),
-          source_file.value(), args[0], err))
+          source_file.value(), args[0], false, err))
     return Value();
 
   // Compute output.
   std::ostringstream contents;
   if (args[1].type() == Value::LIST) {
     const std::vector<Value>& list = args[1].list_value();
     for (size_t i = 0; i < list.size(); i++)
       contents << list[i].ToString(false) << std::endl;
   } else {
     contents << args[1].ToString(false);
@@ skipping 19 matching lines @@
   if (base::WriteFile(file_path, new_contents.c_str(), int_size)
       != int_size) {
     *err = Err(function->function(), "Unable to write file.",
                "I was writing \"" + FilePathToUTF8(file_path) + "\".");
     return Value();
   }
   return Value();
 }
 
 }  // namespace functions