Bug 748469 - (Part 1) Move FormAssistPopup viewport math to Java. r=kats
Bug 748469 - (Part 2) Clean up FormAssist.positionAndShowPopup. r=wesj
Bug 846102 - Remove sub-frame offset from cursor handle position calculation. r=bnicholson
Bug 638219 - Fix test selection after prior landings for bug 638219; rs=Waldo

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extra : rebase_source : eb107700ec8c3e136323ef8173d3d3ec13418de0