Don't dynamically scope GN templates.

tools/gn/BUILD.gn

 # 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.
 
 gyp_file = "gn.gyp"
 external = true
 
 # Not defined when doing a GYP build, this lets the code key off of GN-specific
 # features (the last change target). This can be removed when the last change
 # target is supported by the GN->GYP converter (see is_gyp conditional for that
@@ skipping 127 matching lines @@
     "source_file.cc",
     "source_file.h",
     "standard_out.cc",
     "standard_out.h",
     "string_utils.cc",
     "string_utils.h",
     "target.cc",
     "target.h",
     "target_generator.cc",
     "target_generator.h",
+    "template.cc",
+    "template.h",
     "token.cc",
     "token.h",
     "tokenizer.cc",
     "tokenizer.h",
     "toolchain.cc",
     "toolchain.h",
     "trace.cc",
     "trace.h",
     "value.cc",
     "value.h",
@@ skipping 23 matching lines @@
   }
 }
 
 test("gn_unittests") {
   sources = [
     "builder_unittest.cc",
     "escape_unittest.cc",
     "filesystem_utils_unittest.cc",
     "file_template_unittest.cc",
     "function_rebase_path_unittest.cc",
+    "functions_unittest.cc",
     "gyp_action_target_writer_unittest.cc",
     "gyp_binary_target_writer_unittest.cc",
     "input_conversion_unittest.cc",
     "label_unittest.cc",
     "loader_unittest.cc",
     "ninja_action_target_writer_unittest.cc",
     "ninja_binary_target_writer_unittest.cc",
     "ninja_copy_target_writer_unittest.cc",
     "ninja_helper_unittest.cc",
     "operators_unittest.cc",
@@ skipping 16 matching lines @@
     "//base/test:run_all_unittests",
     "//base/test:test_support_base",
     "//testing/gtest",
   ]
 }
 
 executable("generate_test_gn_data") {
   sources = [ "generate_test_gn_data.cc" ]
   deps = [ "//base" ]
 }