Reland of media: Add experimental feature to enable Mojo CDM on desktop Chromium

media/base/media_switches.cc

Index: media/base/media_switches.cc
diff --git a/media/base/media_switches.cc b/media/base/media_switches.cc
index 71b3bc71a63ae03cdbb45b0383b43548ed578ca7..e04993eedc7ecbfc1619a39d47a8d3262ca0bf5d 100644
--- a/media/base/media_switches.cc
+++ b/media/base/media_switches.cc
@@ -218,6 +218,11 @@
 const base::Feature kMemoryPressureBasedSourceBufferGC{
     "MemoryPressureBasedSourceBufferGC", base::FEATURE_DISABLED_BY_DEFAULT};
 
+// On systems where pepper CDMs are enabled, use mojo CDM instead of PPAPI CDM.
+// Note that mojo CDM support is still under development. Some features are
+// still missing and this feature should only be enabled for testing.
+const base::Feature kMojoCdm{"MojoCdm", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Use the new Remote Playback / media flinging pipeline.
 const base::Feature kNewRemotePlaybackPipeline{
     "NewRemotePlaybackPipeline", base::FEATURE_DISABLED_BY_DEFAULT};