Bug 1059033 - Part 1: Cull DrawTargetTiled operations where we can. r=Bas
Bug 1059033 - Part 2: Approximate path stroke extents for culling since its faster. r=Bas
Bug 1059033 - Part 3: Avoid save/restoring for tiles that are entirely clipped out. r=Bas
Bug 1059033 - Part 4: Avoid recreating DrawTargets too often. r=nical
Bug 1059033 - Part 5: Implement OptimizeSourceSurface for DrawTargetCG. r=Bas
Bug 1059033 - Part 6: Clip text drawing to its bound so we can skip unaffected tiles. r=Bas
Bug 1057212 - Avoid copying all the tiles when doing PushGroupAndCopyBackground. r=Bas
Bug 1059622 - Fuzz some gradient tests that fail with CG tiling. r=Bas