Support external task cancellation mechanisms in base::Callback::IsCancelled

third_party/WebKit/Source/platform/scheduler/test/fake_web_task_runner.cc

Index: third_party/WebKit/Source/platform/scheduler/test/fake_web_task_runner.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/test/fake_web_task_runner.cc b/third_party/WebKit/Source/platform/scheduler/test/fake_web_task_runner.cc
index 2b33ed2e92aa97e2a045156ac7be19a0336e40b4..0d3866696c4a8a163e1566a037b3248cad5a4eb3 100644
--- a/third_party/WebKit/Source/platform/scheduler/test/fake_web_task_runner.cc
+++ b/third_party/WebKit/Source/platform/scheduler/test/fake_web_task_runner.cc
@@ -115,5 +115,9 @@ void FakeWebTaskRunner::runUntilIdle() {
   }
 }
 
+std::deque<base::Closure> FakeWebTaskRunner::takePendingTasksForTesting() {
+  return std::move(data_->task_queue_);
+}
+
 }  // namespace scheduler
 }  // namespace blink