Revert of media: Enable Unified Media Pipeline for MSE and EME on Android

media/base/media.cc

Index: media/base/media.cc
diff --git a/media/base/media.cc b/media/base/media.cc
index 954fb198191d0b9204beac5babeb071c5c6c3429..b2e1c4520174e7a04fb50c393dd3c32646700d2d 100644
--- a/media/base/media.cc
+++ b/media/base/media.cc
@@ -107,6 +107,15 @@
          base::StartsWith(group_name, "Enabled", base::CompareCase::SENSITIVE);
 }
 
+bool IsUnifiedMediaPipelineEnabledForMse() {
+  // Don't check IsUnifiedMediaPipelineEnabled() here since we don't want MSE to
+  // be enabled via experiment yet; only when the existing implementation can't
+  // be used (i.e. MediaCodec unavailable).
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(
+             switches::kEnableUnifiedMediaPipeline) ||
+         !MediaCodecUtil::IsMediaCodecAvailable();
+}
+
 bool ArePlatformDecodersAvailable() {
   return IsUnifiedMediaPipelineEnabled()
              ? HasPlatformDecoderSupport()