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 b2546fc574d45fd0ff580e57d6bc6fc6c4015f9b..291a8a2f3482f163da833f4d07d32a1271d486f4 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
@@ -218,6 +218,10 @@ bool TaskQueueImpl::PostImmediateTaskImpl(
     const tracked_objects::Location& from_here,
     base::Closure task,
     TaskType task_type) {
+  // Use CHECK temporaly to debug http://crbug.com/706854 in the wild.
+  // TODO(tzik): Convert this to DCHECK once the issue is resolved.
+  CHECK(task);
+
   base::AutoLock lock(any_thread_lock_);
   if (!any_thread().task_queue_manager)
     return false;
@@ -236,6 +240,10 @@ bool TaskQueueImpl::PostDelayedTaskImpl(
     base::Closure task,
     base::TimeDelta delay,
     TaskType task_type) {
+  // Use CHECK temporaly to debug http://crbug.com/706854 in the wild.
+  // TODO(tzik): Convert this to DCHECK once the issue is resolved.
+  CHECK(task);
+
   DCHECK_GT(delay, base::TimeDelta());
   if (base::PlatformThread::CurrentId() == thread_id_) {
     // Lock-free fast path for delayed tasks posted from the main thread.