CLOSED TREE Backed out changeset 511a2389ca48 (bug 1276132) Backed out changeset 91b3cdd0640a (bug 1276132) Backed out changeset 09b9972e36f9 (bug 1276132) Backed out changeset 69052d4e3dbb (bug 1276132)
This means we'll only show the EME UI for keysystems that are explicitly turned on in the build config, or those that are enabled after the build via prefs. MozReview-Commit-ID: 7VTp1BJSZFy
MozReview-Commit-ID: BHPpLM96cg3