Chromium -> Mojo roll.

base/test/test_mock_time_task_runner.h

Index: base/test/test_mock_time_task_runner.h
diff --git a/base/test/test_mock_time_task_runner.h b/base/test/test_mock_time_task_runner.h
index c38fd6d9aca13c6f4a9a654bb0984b0ae6d5156d..705af103bbdf4e3eba64799646837f45c1f93214 100644
--- a/base/test/test_mock_time_task_runner.h
+++ b/base/test/test_mock_time_task_runner.h
@@ -94,6 +94,11 @@ class TestMockTimeTaskRunner : public SingleThreadTaskRunner {
  protected:
   ~TestMockTimeTaskRunner() override;
 
+  // Whether the elapsing of virtual time is stopped or not. Subclasses can
+  // override this method to perform early exits from a running task runner.
+  // Defaults to always return false.
+  virtual bool IsElapsingStopped();
+
   // Called before the next task to run is selected, so that subclasses have a
   // last chance to make sure all tasks are posted.
   virtual void OnBeforeSelectingTask();