EME on Android: Improve accuracy of Key System availability.

media/base/media.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/base/media.h"
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/metrics/field_trial.h"
@@ skipping 97 matching lines @@
 }
 
 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()
+             : MediaCodecUtil::IsMediaCodecAvailable();
+}
 #endif
 
 }  // namespace media