SANTA CLARA — Several tech firms disclosed plans to chop hundreds of jobs in the Bay Area in fresh disclosures that show the pace of layoffs this year is running ahead of last year’s totals. ServiceNow, Salesforce, Ubisoft, Quizlet, and Verily Health revealed plans to slash a combined 370 jobs, affecting workers in Santa Clara, San Francisco, and San Bruno. The layoffs are permanent, according to documents on file with the state Employment Development Department.