Fix memory leak with ScriptedIdleTaskController

third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.h

Index: third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.h
diff --git a/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.h b/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.h
index 765c90f35af1b5a1a01cfdb33e0bc4d685b14a0e..3df8b8c8389432a219a2d69b9bd4e5f9b96dd879 100644
--- a/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.h
+++ b/third_party/WebKit/Source/core/dom/ScriptedIdleTaskController.h
@@ -10,6 +10,7 @@
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Vector.h"
+#include "wtf/WeakPtr.h"
 
 namespace blink {
 
@@ -63,6 +64,7 @@ class ScriptedIdleTaskController
   HeapHashMap<CallbackId, Member<IdleRequestCallback>> m_callbacks;
   Vector<CallbackId> m_pendingTimeouts;
   CallbackId m_nextCallbackId;
+  WTF::WeakPtrFactory<ScriptedIdleTaskController> m_weakPtrFactory;
   bool m_suspended;
 };