[scheduler] Add options to TaskQueue::InsertFence

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 ca5ac685b7db8bc37fdc744ff47e9443fbf822e4..771833647c2d38e2b095b925aced3a8bd49e53cc 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
@@ -643,6 +643,19 @@ void TaskQueueImpl::InsertFence() {
   }
 }
 
+void TaskQueueImpl::BlockByFence() {
+  if (!main_thread_only().task_queue_manager)
+    return;
+
+  main_thread_only().current_fence =
+      static_cast<EnqueueOrder>(EnqueueOrderValues::BLOCKING_FENCE);
+
+  main_thread_only().immediate_work_queue->InsertFence(
+      main_thread_only().current_fence);
+  main_thread_only().delayed_work_queue->InsertFence(
+      main_thread_only().current_fence);
+}
+
 void TaskQueueImpl::RemoveFence() {
   if (!main_thread_only().task_queue_manager)
     return;
@@ -701,6 +714,13 @@ bool TaskQueueImpl::BlockedByFenceLocked() const {
          main_thread_only().current_fence;
 }
 
+bool TaskQueueImpl::IsQueueUnblockedForTest() const {
+  if (!IsQueueEnabled())
+    return false;
+  return main_thread_only().current_fence !=
+         static_cast<EnqueueOrder>(EnqueueOrderValues::BLOCKING_FENCE);
+}
+
 // static
 void TaskQueueImpl::QueueAsValueInto(const std::queue<Task>& queue,
                                      base::trace_event::TracedValue* state) {