Revert of Enforce ordering in FilterTestNames.

build/util/lib/common/unittest_util.py

Index: build/util/lib/common/unittest_util.py
diff --git a/build/util/lib/common/unittest_util.py b/build/util/lib/common/unittest_util.py
index e2ad0e2ffc26cfd43eacea9178d6137c1dde58c9..189f5871c740f046093bf36f69639407214bba78 100644
--- a/build/util/lib/common/unittest_util.py
+++ b/build/util/lib/common/unittest_util.py
@@ -132,18 +132,22 @@
   positive_patterns = ['*']
   if pattern_groups[0]:
     positive_patterns = pattern_groups[0].split(':')
-  negative_patterns = []
+  negative_patterns = None
   if len(pattern_groups) > 1:
     negative_patterns = pattern_groups[1].split(':')
 
   tests = []
-  test_set = set()
-  for pattern in positive_patterns:
-    pattern_tests = [
-        test for test in all_tests
-        if (fnmatch.fnmatch(test, pattern)
-            and not any(fnmatch(test, p) for p in negative_patterns)
-            and test not in test_set)]
-    tests.extend(pattern_tests)
-    test_set.update(pattern_tests)
+  for test in all_tests:
+    # Test name must by matched by one positive pattern.
+    for pattern in positive_patterns:
+      if fnmatch.fnmatch(test, pattern):
+        break
+    else:
+      continue
+    # Test name must not be matched by any negative patterns.
+    for pattern in negative_patterns or []:
+      if fnmatch.fnmatch(test, pattern):
+        break
+    else:
+      tests += [test]
   return tests