[DONT COMMIT] Worker: Add checks in InProcessWorkerObjectProxy for debug

third_party/WebKit/Source/core/workers/InProcessWorkerObjectProxy.h

Index: third_party/WebKit/Source/core/workers/InProcessWorkerObjectProxy.h
diff --git a/third_party/WebKit/Source/core/workers/InProcessWorkerObjectProxy.h b/third_party/WebKit/Source/core/workers/InProcessWorkerObjectProxy.h
index 3dd4b62ba7ef5ed4b731cf1fb83ff5b7c8ca3742..c1f4d3ad33a66efdd6676cdb834dc8d780f718fc 100644
--- a/third_party/WebKit/Source/core/workers/InProcessWorkerObjectProxy.h
+++ b/third_party/WebKit/Source/core/workers/InProcessWorkerObjectProxy.h
@@ -114,6 +114,10 @@ class CORE_EXPORT InProcessWorkerObjectProxy : public ThreadedObjectProxyBase {
   // but made as a member variable for testing.
   double max_interval_in_sec_;
 
+  // TODO(nhiroki): Remove these flags after https://crbug.com/713914 is fixed.
+  bool was_initialized_ = false;
+  bool was_destroyed_ = false;
+
   CrossThreadPersistent<WorkerGlobalScope> worker_global_scope_;
 };