Samsung Electronics spearheaded Korea Inc.’s drive to put the country on the map. Over the past decade, the company transformed itself from a dowdy maker of copycat consumer products into a powerhouse rolling out must-haves. With the company’s leadership in memory chips under attack, Samsung is set to post a third consecutive drop in earnings. Although top executives worry that the Korean giant isn’t an innovation leader like Apple, annual net profit is still expected to top $7 billion this year.