Introduce a holder for compile jobs

src/compiler-dispatcher/compiler-dispatcher-job.cc

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/compiler-dispatcher/compiler-dispatcher-job.h"
+
+#include "src/global-handles.h"
+#include "src/isolate.h"
+#include "src/objects-inl.h"
+
+namespace v8 {
+namespace internal {
+
+CompilerDispatcherJob::CompilerDispatcherJob(Isolate* isolate,
+                                             Handle<JSFunction> function)
+    : isolate_(isolate),
+      function_(Handle<JSFunction>::cast(
+          isolate_->global_handles()->Create(*function))) {}
+
+CompilerDispatcherJob::~CompilerDispatcherJob() {
+  i::GlobalHandles::Destroy(Handle<Object>::cast(function_).location());
+}
+
+}  // namespace internal
+}  // namespace v8