Make 'any'-typed attributes of events available in isolated worlds

LayoutTests/fast/events/event-isolated-world-clone-expected.txt

Index: LayoutTests/fast/events/event-isolated-world-clone-expected.txt
diff --git a/LayoutTests/fast/events/event-isolated-world-clone-expected.txt b/LayoutTests/fast/events/event-isolated-world-clone-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..74d798bf47d35b2f0076c248c943e62e9a5e8d0d
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+++ b/LayoutTests/fast/events/event-isolated-world-clone-expected.txt
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+CONSOLE MESSAGE: line 6: Tests that properties of various events are cloned between isolated worlds.
+CONSOLE MESSAGE: line 10: CustomEvent received in main world
+CONSOLE MESSAGE: line 11: detail was {"foo":5,"bar":"hello","targetWorld":"main"}
+CONSOLE MESSAGE: line 3: CustomEvent received in isolated world
+CONSOLE MESSAGE: line 4: detail was {"foo":5,"bar":"hello","targetWorld":"isolated"}
+CONSOLE MESSAGE: line 10: MessageEvent received in main world
+CONSOLE MESSAGE: line 11: data was {"foo":5,"bar":"hello","targetWorld":"main"}
+CONSOLE MESSAGE: line 3: MessageEvent received in isolated world
+CONSOLE MESSAGE: line 4: data was {"foo":5,"bar":"hello","targetWorld":"isolated"}
+CONSOLE MESSAGE: line 10: PopStateEvent received in main world
+CONSOLE MESSAGE: line 11: state was {"foo":5,"bar":"hello","targetWorld":"main"}
+CONSOLE MESSAGE: line 3: PopStateEvent received in isolated world
+CONSOLE MESSAGE: line 4: state was {"foo":5,"bar":"hello","targetWorld":"isolated"}
+