V8 Bindings: Don't attempt to set an empty V8HiddenValue

third_party/WebKit/Source/bindings/core/v8/V8HiddenValue.cpp

Index: third_party/WebKit/Source/bindings/core/v8/V8HiddenValue.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8HiddenValue.cpp b/third_party/WebKit/Source/bindings/core/v8/V8HiddenValue.cpp
index 58af4258d304900a1d23d7e9b480f92402d724b7..bd1191daa7653c12e7d1123f4e144d460500f013 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8HiddenValue.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8HiddenValue.cpp
@@ -37,6 +37,8 @@ v8::Local<v8::Value> V8HiddenValue::getHiddenValue(ScriptState* scriptState, v8:
 
 bool V8HiddenValue::setHiddenValue(ScriptState* scriptState, v8::Local<v8::Object> object, v8::Local<v8::String> key, v8::Local<v8::Value> value)
 {
+    if (UNLIKELY(value.IsEmpty()))
+        return false;
     return v8CallBoolean(object->SetPrivate(scriptState->context(), v8::Private::ForApi(scriptState->isolate(), key), value));
 }