Cleanup test server instance after running each a test in gtest test runner

build/android/pylib/base/base_test_runner.py

Index: build/android/pylib/base/base_test_runner.py
diff --git a/build/android/pylib/base/base_test_runner.py b/build/android/pylib/base/base_test_runner.py
index 368ae9ecf487bf9539ec39459ce8f3cc1e64539a..fd4d79295e2edafcddb69ee03a16ae084569c875 100644
--- a/build/android/pylib/base/base_test_runner.py
+++ b/build/android/pylib/base/base_test_runner.py
@@ -166,6 +166,15 @@ class BaseTestRunner(object):
       self._spawning_server.Stop()
     self.flags.Restore()
 
+  def CleanupSpawningServerState(self):
+    """Tells the spawning server to clean up any state.
+
+    If the spawning server is reused for multiple tests, this should be called
+    after each test to prevent tests affecting each other.
+    """
+    if self._spawning_server:
+      self._spawning_server.CleanupState()
+
   def LaunchChromeTestServerSpawner(self):
     """Launches test server spawner."""
     server_ready = False