[compiler] Collect eager inner functions for compilation during renumbering.

src/utils.h

Index: src/utils.h
diff --git a/src/utils.h b/src/utils.h
index 6ee37ffa8d032eb77b58cfde1957adbade4b11ac..0ea1de1e0732ec289a27776867bd770d6cd4fbfd 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -20,6 +20,7 @@
 #include "src/globals.h"
 #include "src/list.h"
 #include "src/vector.h"
+#include "src/zone/zone.h"
 
 namespace v8 {
 namespace internal {
@@ -1686,6 +1687,21 @@ class ThreadedList final {
   DISALLOW_COPY_AND_ASSIGN(ThreadedList);
 };
 
+// Can be used to create a threaded list of |T|.
+template <typename T>
+class ThreadedListZoneEntry final : public ZoneObject {
+ public:
+  explicit ThreadedListZoneEntry(T value) : value_(value), next_(nullptr) {}
+
+  T value() { return value_; }
+  ThreadedListZoneEntry<T>** next() { return &next_; }
+
+ private:
+  T value_;
+  ThreadedListZoneEntry<T>* next_;
+  DISALLOW_COPY_AND_ASSIGN(ThreadedListZoneEntry);
+};
+
 }  // namespace internal
 }  // namespace v8