[chromium] Defer texture id allocation for copies until the actual copy executes
Created attachment 136316 [details] Patch
This is a prereq for removing LayerChromium::updateCompositorResources(), which I'll do in a separate patch (since it's biggish).
Comment on attachment 136316 [details] Patch Nice. R=me.
Committed r113740: <http://trac.webkit.org/changeset/113740>