Ensure correct line endings for method_mirror_source tests.

R=whesse@google.com
BUG=

Review URL: https://codereview.chromium.org//1218813002.

.gitattributes

@@ -17,9 +17,12 @@ tests/compiler/dart2js_extra/literal_string_juxtaposition_test.dart -text
 tests/language/raw_string_test.dart -text
 tests/language/multiline_strings_test.dart -text
 tests/lib/convert/json_pretty_test.dart -text
+tests/lib/mirrors/method_mirror_source_line_ending_test.dart -text
 tests/lib/mirrors/method_mirror_source_line_ending_cr.dart -text
 tests/lib/mirrors/method_mirror_source_line_ending_crlf.dart -text
 tests/lib/mirrors/method_mirror_source_line_ending_lf.dart -text
+tests/lib/mirrors/method_mirror_source_test.dart -text
+tests/lib/mirrors/method_mirror_source_other.dart -text
 pkg/js_ast/test/printer_callback_test.dart -text
 
 # Files to leave alone and not diff.

tests/lib/mirrors/method_mirror_source_line_ending_lf.dart

@@ -2,8 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// This file is marked executable so source control will preserve the type of
-// line ending.
+// Note: This test relies on LF line endings in the source file.
 
 library line_endings.lf;
 

tests/lib/mirrors/method_mirror_source_line_ending_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Note: These tests rely on specific line endings in the source files.
+
 import "dart:mirrors";
 import "package:expect/expect.dart";
 

tests/lib/mirrors/method_mirror_source_other.dart

@@ -3,4 +3,6 @@ main() {
 }
 // This function must be on the first line.
 
-class SomethingInOther {}
+class SomethingInOther {}
+
+// Note: This test relies on LF line endings in the source file.

tests/lib/mirrors/method_mirror_source_test.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// Note: This test relies on LF line endings in the source file.
+
 import "dart:mirrors";
 import "package:expect/expect.dart";
 import "method_mirror_source_other.dart";