binding: Compiles event handlers only once at most.

third_party/WebKit/Source/bindings/core/v8/V8LazyEventListener.h

Index: third_party/WebKit/Source/bindings/core/v8/V8LazyEventListener.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8LazyEventListener.h b/third_party/WebKit/Source/bindings/core/v8/V8LazyEventListener.h
index 3e877f93d9b83511816b6fa77cd1682c01653e6a..576e9c0ffff2f223818959b4d29468b9b385660a 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8LazyEventListener.h
+++ b/third_party/WebKit/Source/bindings/core/v8/V8LazyEventListener.h
@@ -59,7 +59,7 @@ public:
     const String& code() const { return m_code; }
 
 protected:
-    void prepareListenerObject(ExecutionContext*) override;
+    v8::Local<v8::Object> getListenerObjectInternal(ExecutionContext*) override;
 
 private:
     V8LazyEventListener(v8::Isolate*, const AtomicString& functionName, const AtomicString& eventParameterName, const String& code, const String sourceURL, const TextPosition&, Node*);
@@ -72,8 +72,11 @@ private:
     // SVGUseElement::transferEventListenersToShadowTree
     bool wasCreatedFromMarkup() const override { return true; }
 
+    void compileScript(ScriptState*, ExecutionContext*);
+
     void fireErrorEvent(v8::Local<v8::Context>, ExecutionContext*, v8::Local<v8::Message>);
 
+    bool m_wasCompilationFailed;
     AtomicString m_functionName;
     AtomicString m_eventParameterName;
     String m_code;