Make WebTaskRunner ThreadSafeRefCounted

third_party/WebKit/Source/platform/scheduler/child/web_scheduler_impl.h

Index: third_party/WebKit/Source/platform/scheduler/child/web_scheduler_impl.h
diff --git a/third_party/WebKit/Source/platform/scheduler/child/web_scheduler_impl.h b/third_party/WebKit/Source/platform/scheduler/child/web_scheduler_impl.h
index 201a66d5aa95fa0f9b20e974b6c662025a205856..a802e3620bad88ecd791c71fb4a36ac3c76cfb1b 100644
--- a/third_party/WebKit/Source/platform/scheduler/child/web_scheduler_impl.h
+++ b/third_party/WebKit/Source/platform/scheduler/child/web_scheduler_impl.h
@@ -7,6 +7,7 @@
 
 #include <memory>
 
+#include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "public/platform/WebCommon.h"
@@ -55,8 +56,10 @@ class BLINK_PLATFORM_EXPORT WebSchedulerImpl : public WebScheduler {
   ChildScheduler* child_scheduler_;  // NOT OWNED
   scoped_refptr<SingleThreadIdleTaskRunner> idle_task_runner_;
   scoped_refptr<TaskQueue> timer_task_runner_;
-  std::unique_ptr<WebTaskRunnerImpl> loading_web_task_runner_;
-  std::unique_ptr<WebTaskRunnerImpl> timer_web_task_runner_;
+  RefPtr<WebTaskRunnerImpl> loading_web_task_runner_;
+  RefPtr<WebTaskRunnerImpl> timer_web_task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebSchedulerImpl);
 };
 
 }  // namespace scheduler