146459 2015-06-30 10:02:42 -0700 [Win] Remove LegacyCACFLaterTreeHost Implementation 2015-08-05 09:25:39 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) PC All RESOLVED DUPLICATE 147388 P2 Normal --- 1 bfulgham bfulgham aroben bfulgham simon.fraser thorton oldest_to_newest 1105698 0 bfulgham 2015-06-30 10:02:42 -0700 Now that we've moved our target OS to Windows 7, I don't think there is a need to retain the old LegacyCACFLayerTreeHost implementation. This code path is only used for the Apple Windows port, and I don't think there are any active cases where we hit this code anymore. 1105699 1 bfulgham 2015-06-30 10:03:12 -0700 CC'ing aroben in case I'm missing something regarding this code. 1105745 2 aroben 2015-06-30 12:09:37 -0700 Is there some new mechanism being used for accelerated compositing on Windows 7+? 1105748 3 aroben 2015-06-30 12:14:14 -0700 Oh, I see, WKCACFViewLayerTreeHost is the replacement. The code makes it look like that class is used whenever WebKitQuartzCoreAdditions.dll is present, which seems like it shouldn't be dependent on the version of Windows being run. I think the only consideration is whether you want to support old versions of AAS that don't contain that DLL. 1106163 4 bfulgham 2015-07-01 13:48:01 -0700 (In reply to comment #3) > Oh, I see, WKCACFViewLayerTreeHost is the replacement. The code makes it > look like that class is used whenever WebKitQuartzCoreAdditions.dll is > present, which seems like it shouldn't be dependent on the version of > Windows being run. I think the only consideration is whether you want to > support old versions of AAS that don't contain that DLL. Yeah -- I don't think there is any such thing (at least, not that we want to be supporting). So I think it's just dead code at this point. 1115026 5 bfulgham 2015-08-05 09:25:39 -0700 *** This bug has been marked as a duplicate of bug 147388 ***