Optimize for TouchStart responsiveness

components/scheduler/renderer/task_cost_estimator_unittest.cc

Index: components/scheduler/renderer/task_cost_estimator_unittest.cc
diff --git a/components/scheduler/renderer/task_cost_estimator_unittest.cc b/components/scheduler/renderer/task_cost_estimator_unittest.cc
index 7e104edac5ccfe5b9ea1034bd14730ec3e0351e9..563b747e98c66f3e6e40f6176edbeb05f6b54072 100644
--- a/components/scheduler/renderer/task_cost_estimator_unittest.cc
+++ b/components/scheduler/renderer/task_cost_estimator_unittest.cc
@@ -44,7 +44,20 @@ TEST_F(TaskCostEstimatorTest, BasicEstimation) {
 
   EXPECT_EQ(base::TimeDelta::FromMilliseconds(500),
             estimator.expected_task_duration());
-};
+}
+
+TEST_F(TaskCostEstimatorTest, Clear) {
+  TaskCostEstimatorForTest estimator(&clock_, 1, 100);
+  base::PendingTask task(FROM_HERE, base::Closure());
+
+  estimator.WillProcessTask(task);
+  clock_.Advance(base::TimeDelta::FromMilliseconds(500));
+  estimator.DidProcessTask(task);
+
+  estimator.Clear();
+
+  EXPECT_EQ(base::TimeDelta(), estimator.expected_task_duration());
+}
 
 TEST_F(TaskCostEstimatorTest, NestedRunLoop) {
   TaskCostEstimatorForTest estimator(&clock_, 1, 100);
@@ -60,6 +73,6 @@ TEST_F(TaskCostEstimatorTest, NestedRunLoop) {
 
   EXPECT_EQ(base::TimeDelta::FromMilliseconds(1000),
             estimator.expected_task_duration());
-};
+}
 
 }  // namespace scheduler