IndexedDB: Replace custom binding logic with [SetWrapperReferenceTo]

Source/bindings/modules/v8/IDBBindingUtilities.cpp

Index: Source/bindings/modules/v8/IDBBindingUtilities.cpp
diff --git a/Source/bindings/modules/v8/IDBBindingUtilities.cpp b/Source/bindings/modules/v8/IDBBindingUtilities.cpp
index 6bfa0b7269a3149a2befa32957b644965ad5f5b9..14ef3138ffd404c762628b3639af75135d417045 100644
--- a/Source/bindings/modules/v8/IDBBindingUtilities.cpp
+++ b/Source/bindings/modules/v8/IDBBindingUtilities.cpp
@@ -116,28 +116,10 @@ static v8::Local<v8::Value> toV8(const IDBAny* impl, v8::Local<v8::Object> creat
         return v8::Null(isolate);
     case IDBAny::DOMStringListType:
         return toV8(impl->domStringList(), creationContext, isolate);
-    case IDBAny::IDBCursorType: {
-        // Ensure request wrapper is kept alive at least as long as the cursor wrapper,
-        // so that event listeners are retained.
-        v8::Local<v8::Value> cursor = toV8(impl->idbCursor(), creationContext, isolate);
-        v8::Local<v8::Value> request = toV8(impl->idbCursor()->request(), creationContext, isolate);
-
-        // FIXME: Due to race at worker shutdown, V8 may return empty handles.

[jsbell, 2015/02/13 19:28:00]

Hopefully we're already handling this in the generated code...

-        if (!cursor.IsEmpty())
-            V8HiddenValue::setHiddenValue(isolate, cursor->ToObject(isolate), V8HiddenValue::idbCursorRequest(isolate), request);
-        return cursor;
-    }
-    case IDBAny::IDBCursorWithValueType: {
-        // Ensure request wrapper is kept alive at least as long as the cursor wrapper,
-        // so that event listeners are retained.
-        v8::Local<v8::Value> cursor = toV8(impl->idbCursorWithValue(), creationContext, isolate);
-        v8::Local<v8::Value> request = toV8(impl->idbCursorWithValue()->request(), creationContext, isolate);
-
-        // FIXME: Due to race at worker shutdown, V8 may return empty handles.
-        if (!cursor.IsEmpty())
-            V8HiddenValue::setHiddenValue(isolate, cursor->ToObject(isolate), V8HiddenValue::idbCursorRequest(isolate), request);
-        return cursor;
-    }
+    case IDBAny::IDBCursorType:
+        return toV8(impl->idbCursor(), creationContext, isolate);
+    case IDBAny::IDBCursorWithValueType:
+        return toV8(impl->idbCursorWithValue(), creationContext, isolate);
     case IDBAny::IDBDatabaseType:
         return toV8(impl->idbDatabase(), creationContext, isolate);
     case IDBAny::IDBIndexType: