DCHECK tasks posted by TaskRunner::PostTask

third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc

Index: third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc b/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
index 8877bd468cc0a38f62f24f31c06a48289620a662..f0758bae6e5793818902f518ec407e5c2d5a4072 100644
--- a/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
+++ b/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
@@ -219,6 +219,7 @@ bool TaskQueueImpl::PostImmediateTaskImpl(
     const tracked_objects::Location& from_here,
     base::Closure task,
     TaskType task_type) {
+  DCHECK(task);
   base::AutoLock lock(any_thread_lock_);
   if (!any_thread().task_queue_manager)
     return false;
@@ -237,6 +238,7 @@ bool TaskQueueImpl::PostDelayedTaskImpl(
     base::Closure task,
     base::TimeDelta delay,
     TaskType task_type) {
+  DCHECK(task);
   DCHECK_GT(delay, base::TimeDelta());
   if (base::PlatformThread::CurrentId() == thread_id_) {
     // Lock-free fast path for delayed tasks posted from the main thread.