Bug 1021085 - Refactor code to ensure we use the same scrolling ancestor layer everywhere. r=
Bug 1021085 - Fix up the transform used for the compositor side composition bounds. r=
Bug 1021085 - Remove unnecessary transform stored on the paint data. r=
Bug 1021085 - Fix up the Fennec code path as well. r=
Bug 1021085 - Use the entire compositor-side composition bounds as the coherent update rect on B2G. r=
Bug 1021085 - Miscellaneous cleanup. r=
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