Use TaskScheduler instead of WorkerPool in v8_platform.cc.

gin/v8_platform.cc

Index: gin/v8_platform.cc
diff --git a/gin/v8_platform.cc b/gin/v8_platform.cc
index 6e5491bff11801397e353cb371b1a9762fffb970..44f8dd8c8fd781f263d806ee3410003f4e545d49 100644
--- a/gin/v8_platform.cc
+++ b/gin/v8_platform.cc
@@ -7,7 +7,7 @@
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/sys_info.h"
-#include "base/threading/worker_pool.h"
+#include "base/task_scheduler/post_task.h"
 #include "base/trace_event/trace_event.h"
 #include "gin/per_isolate_data.h"
 
@@ -67,10 +67,10 @@ size_t V8Platform::NumberOfAvailableBackgroundThreads() {
 void V8Platform::CallOnBackgroundThread(
     v8::Task* task,
     v8::Platform::ExpectedRuntime expected_runtime) {
-  base::WorkerPool::PostTask(
-      FROM_HERE,
-      base::Bind(&v8::Task::Run, base::Owned(task)),
-      expected_runtime == v8::Platform::kLongRunningTask);
+  base::PostTaskWithTraits(
+      FROM_HERE, base::TaskTraits().WithShutdownBehavior(
+                     base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN),
+      base::Bind(&v8::Task::Run, base::Owned(task)));
 }
 
 void V8Platform::CallOnForegroundThread(v8::Isolate* isolate, v8::Task* task) {