Make test filters play nice

base/test/launcher/test_launcher.h

Index: base/test/launcher/test_launcher.h
diff --git a/base/test/launcher/test_launcher.h b/base/test/launcher/test_launcher.h
index 218d8b627a969a8de32d65c9d1f947ee2af39887..a2fd8b241b9200f7cb6526d20b54aa367d8308a1 100644
--- a/base/test/launcher/test_launcher.h
+++ b/base/test/launcher/test_launcher.h
@@ -142,6 +142,9 @@ class TestLauncher {
   // Runs all tests in current iteration. Uses callbacks to communicate success.
   void RunTests();
 
+  void CombinePositiveTestFilters(std::vector<std::string> filter_a,
+                                  std::vector<std::string> filter_b);
+
   void RunTestIteration();
 
   // Saves test results summary as JSON if requested from command line.
@@ -181,6 +184,7 @@ class TestLauncher {
   int cycles_;  // Number of remaining test itreations, or -1 for infinite.
 
   // Test filters (empty means no filter).
+  bool has_at_least_one_positive_filter_;
   std::vector<std::string> positive_test_filter_;
   std::vector<std::string> negative_test_filter_;