Bug 966679 - Implement widget paint flashing for BasicCompositor. r=roc
Bug 966679 - Make sure all RefLayers are resolved before calling BeginTransaction. r=nical
Bug 966679 - Make LayerProperties aware of RefLayers. r=roc
Bug 966679 - Resolve RefLayers during IPDL transactions. r=nical
Bug 966679 - Mark Layers as Mutated if they have an invalid region. r=roc