GTTF: add an option to pass test filter using a file

base/test/launcher/test_launcher.h

 // Copyright 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.
 
 #ifndef BASE_TEST_LAUNCHER_TEST_LAUNCHER_H_
 #define BASE_TEST_LAUNCHER_TEST_LAUNCHER_H_
 
 #include <set>
 #include <string>
 
@@ skipping 132 matching lines @@
   ThreadChecker thread_checker_;
 
   TestLauncherDelegate* launcher_delegate_;
 
   // Support for outer sharding, just like gtest does.
   int32 total_shards_;  // Total number of outer shards, at least one.
   int32 shard_index_;   // Index of shard the launcher is to run.
 
   int cycles_;  // Number of remaining test itreations, or -1 for infinite.
 
-  // Test filters (empty means no filter). Entries are separated by colons.
-  std::string positive_test_filter_;
-  std::string negative_test_filter_;
+  // Test filters (empty means no filter).
+  std::vector<std::string> positive_test_filter_;
+  std::vector<std::string> negative_test_filter_;
 
   // Number of tests started in this iteration.
   size_t test_started_count_;
 
   // Number of tests finished in this iteration.
   size_t test_finished_count_;
 
   // Number of tests successfully finished in this iteration.
   size_t test_success_count_;
 
@@ skipping 49 matching lines @@
 // running after |timeout|, it is terminated and |*was_timeout| is set to true.
 // Returns exit code of the process.
 int LaunchChildTestProcessWithOptions(const CommandLine& command_line,
                                       const LaunchOptions& options,
                                       base::TimeDelta timeout,
                                       bool* was_timeout);
 
 }  // namespace base
 
 #endif  // BASE_TEST_LAUNCHER_TEST_LAUNCHER_H_