--- a/dom/media/platforms/gonk/GonkDecoderModule.cpp
+++ b/dom/media/platforms/gonk/GonkDecoderModule.cpp
@@ -13,23 +13,16 @@ namespace mozilla {
 GonkDecoderModule::GonkDecoderModule()
 {
 }
 
 GonkDecoderModule::~GonkDecoderModule()
 {
 }
 
-/* static */
-void
-GonkDecoderModule::Init()
-{
-  MOZ_ASSERT(NS_IsMainThread(), "Must be on main thread.");
-}
-
 already_AddRefed<MediaDataDecoder>
 GonkDecoderModule::CreateVideoDecoder(const VideoInfo& aConfig,
                                      mozilla::layers::LayersBackend aLayersBackend,
                                      mozilla::layers::ImageContainer* aImageContainer,
                                      FlushableTaskQueue* aVideoTaskQueue,
                                      MediaDataDecoderCallback* aCallback,
                                      DecoderDoctorDiagnostics* aDiagnostics)
 {

--- a/dom/media/platforms/gonk/GonkDecoderModule.h
+++ b/dom/media/platforms/gonk/GonkDecoderModule.h
@@ -27,18 +27,16 @@ public:
 
   // Decode thread.
   already_AddRefed<MediaDataDecoder>
   CreateAudioDecoder(const AudioInfo& aConfig,
                      FlushableTaskQueue* aAudioTaskQueue,
                      MediaDataDecoderCallback* aCallback,
                      DecoderDoctorDiagnostics* aDiagnostics) override;
 
-  static void Init();
-
   ConversionRequired
   DecoderNeedsConversion(const TrackInfo& aConfig) const override;
 
   bool SupportsMimeType(const nsACString& aMimeType,
                         DecoderDoctorDiagnostics* aDiagnostics) const override;
 
 };
 

--- a/dom/media/platforms/omx/OmxDecoderModule.cpp
+++ b/dom/media/platforms/omx/OmxDecoderModule.cpp
@@ -28,22 +28,16 @@ OmxDecoderModule::CreateAudioDecoder(con
                                      FlushableTaskQueue* aAudioTaskQueue,
                                      MediaDataDecoderCallback* aCallback,
                                      DecoderDoctorDiagnostics* aDiagnostics)
 {
   RefPtr<OmxDataDecoder> decoder = new OmxDataDecoder(aConfig, aCallback, nullptr);
   return decoder.forget();
 }
 
-void
-OmxDecoderModule::Init()
-{
-  MOZ_ASSERT(NS_IsMainThread(), "Must be on main thread.");
-}
-
 PlatformDecoderModule::ConversionRequired
 OmxDecoderModule::DecoderNeedsConversion(const TrackInfo& aConfig) const
 {
   return kNeedNone;
 }
 
 bool
 OmxDecoderModule::SupportsMimeType(const nsACString& aMimeType,

--- a/dom/media/platforms/omx/OmxDecoderModule.h
+++ b/dom/media/platforms/omx/OmxDecoderModule.h
@@ -22,18 +22,16 @@ public:
                      DecoderDoctorDiagnostics* aDiagnostics) override;
 
   already_AddRefed<MediaDataDecoder>
   CreateAudioDecoder(const AudioInfo& aConfig,
                      FlushableTaskQueue* aAudioTaskQueue,
                      MediaDataDecoderCallback* aCallback,
                      DecoderDoctorDiagnostics* aDiagnostics) override;
 
-  static void Init();
-
   bool SupportsMimeType(const nsACString& aMimeType,
                         DecoderDoctorDiagnostics* aDiagnostics) const override;
 
   ConversionRequired DecoderNeedsConversion(const TrackInfo& aConfig) const override;
 };
 
 } // namespace mozilla