[TEST] Forbid ImageResourceContent::updateImage() reentrancy

third_party/WebKit/Source/core/loader/resource/ImageResourceContent.h

Index: third_party/WebKit/Source/core/loader/resource/ImageResourceContent.h
diff --git a/third_party/WebKit/Source/core/loader/resource/ImageResourceContent.h b/third_party/WebKit/Source/core/loader/resource/ImageResourceContent.h
index 2cafe274fdddd13894f411bd3d6fc38f56ce01b9..30063291113457e1d3ef2265de5fe467eb66646a 100644
--- a/third_party/WebKit/Source/core/loader/resource/ImageResourceContent.h
+++ b/third_party/WebKit/Source/core/loader/resource/ImageResourceContent.h
@@ -161,6 +161,8 @@ class CORE_EXPORT ImageResourceContent final
   // Indicates if this resource's encoded image data can be purged and refetched
   // from disk cache to save memory usage. See crbug/664437.
   bool m_isRefetchableDataFromDiskCache;
+
+  bool m_isUpdateImageBeingCalled = false;
 };
 
 }  // namespace blink