Make WebTaskRunner ThreadSafeRefCounted

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

Index: third_party/WebKit/Source/platform/scheduler/test/fake_web_task_runner.h
diff --git a/third_party/WebKit/Source/platform/scheduler/test/fake_web_task_runner.h b/third_party/WebKit/Source/platform/scheduler/test/fake_web_task_runner.h
index 4a6c435a9057060ce7492d79305bfa4bb5ff92c6..4ab08c9f13430c33885545d84f921825fd39e37d 100644
--- a/third_party/WebKit/Source/platform/scheduler/test/fake_web_task_runner.h
+++ b/third_party/WebKit/Source/platform/scheduler/test/fake_web_task_runner.h
@@ -20,7 +20,6 @@ namespace scheduler {
 class FakeWebTaskRunner : public WebTaskRunner {
  public:
   FakeWebTaskRunner();
-  ~FakeWebTaskRunner() override;
 
   void setTime(double new_time);
 
@@ -31,7 +30,6 @@ class FakeWebTaskRunner : public WebTaskRunner {
                        const base::Closure&,
                        double) override;
   bool runsTasksOnCurrentThread() override;
-  std::unique_ptr<WebTaskRunner> clone() override;
   double virtualTimeSeconds() const override;
   double monotonicallyIncreasingVirtualTimeSeconds() const override;
   SingleThreadTaskRunner* toSingleThreadTaskRunner() override;
@@ -40,6 +38,8 @@ class FakeWebTaskRunner : public WebTaskRunner {
   std::deque<base::Closure> takePendingTasksForTesting();
 
  private:
+  ~FakeWebTaskRunner() override;
+
   class Data;
   class BaseTaskRunner;
   RefPtr<Data> data_;