Bug 841554 - Part 1: extend nsISearchEngine to include identifier. r=gavin, a=bajaj
Bug 841554 - Part 2: alter search counts provider to record all of Mozilla's partner engines in each locale. r=gps, a=bajaj
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Bug 841554 - Follow-up: fix browser_aboutHome.js. r=gps
Bug 841554 - Part 3: follow-up fix for another test failure. r=trivial, a=bustage.