Backed out 5 changesets (bug 1915798, bug 1904665) for causing failures pointer_mouse_drag.py
Backed out changeset c163aae0b922 (bug 1915798)
Backed out changeset 27efecb55f94 (bug 1915798)
Backed out changeset 7670532062ec (bug 1904665)
Backed out changeset 669d9db4d064 (bug 1904665)
Backed out changeset a7ed7e623ec9 (bug 1904665)
gecko-commit: af6d5b1328c3584008d7423fcdb7a3d0919b1de2