there is no business synergy for Google & Walmart Merger, the both US companies merger.
What the Bloomberg article talks about is a joint venture of Walmart & Google in INDIA as a separate entity to buy Flipkart 75% stake.
I would guess, Google may take minority stake like 30% in that Joint venture, that may comfort Watmart .
Instaed of doing $15B on their own, and getting google skin to make sure the this takeover will success in long run aginst Amazon to put up $10 Billion and goole $5 Billion .