BRUSSELS (Reuters) -Google's YouTube and TikTok will be asked by EU industry chief Thierry Breton to explain how they protect children from illegal and harmful content on their platforms in line with new EU rules, a person with direct knowledge of the matter told Reuters on Wednesday. The move by Breton comes three days after he told TikTok Chief Executive Officer Shou Zi Chew to spare no effort to counter disinformation on its platform, owned by China's ByteDance.