BRUSSELS — European Parliament President Roberta Metsola is trying to push through a controversial law on scanning child abuse content online even though it has been repeatedly slapped down by her own chamber, according to a document seen by POLITICO. In a step that diplomats deem “without precedent,” the top EU politician has asked member countries in the Council to approve a bill that her own Parliament shot down in a plenary vote in March. At stake is whether the EU allows tech platforms to