--- a/dom/media/platforms/agnostic/TheoraDecoder.cpp
+++ b/dom/media/platforms/agnostic/TheoraDecoder.cpp
@@ -33,18 +33,17 @@ ogg_packet InitTheoraPacket(const unsign
   packet.b_o_s = aBOS;
   packet.e_o_s = aEOS;
   packet.granulepos = aGranulepos;
   packet.packetno = aPacketNo;
   return packet;
 }
 
 TheoraDecoder::TheoraDecoder(const CreateDecoderParams& aParams)
-  : mImageAllocator(aParams.mKnowsCompositor)
-  , mImageContainer(aParams.mImageContainer)
+  : mImageContainer(aParams.mImageContainer)
   , mTaskQueue(aParams.mTaskQueue)
   , mTheoraSetupInfo(nullptr)
   , mTheoraDecoderContext(nullptr)
   , mPacketCount(0)
   , mInfo(aParams.VideoConfig())
 {
   MOZ_COUNT_CTOR(TheoraDecoder);
 }
@@ -174,18 +173,17 @@ TheoraDecoder::ProcessDecode(MediaRawDat
                                    mImageContainer,
                                    aSample->mOffset,
                                    aSample->mTime,
                                    aSample->mDuration,
                                    b,
                                    aSample->mKeyframe,
                                    aSample->mTimecode,
                                    mInfo.ScaledImageRect(mTheoraInfo.frame_width,
-                                                         mTheoraInfo.frame_height),
-                                   mImageAllocator);
+                                                         mTheoraInfo.frame_height));
     if (!v) {
       LOG(
         "Image allocation error source %ux%u display %ux%u picture %ux%u",
         mTheoraInfo.frame_width,
         mTheoraInfo.frame_height,
         mInfo.mDisplay.width,
         mInfo.mDisplay.height,
         mInfo.mImage.width,

--- a/dom/media/platforms/agnostic/TheoraDecoder.h
+++ b/dom/media/platforms/agnostic/TheoraDecoder.h
@@ -33,17 +33,16 @@ public:
   }
 
 private:
   ~TheoraDecoder();
   nsresult DoDecodeHeader(const unsigned char* aData, size_t aLength);
 
   RefPtr<DecodePromise> ProcessDecode(MediaRawData* aSample);
 
-  RefPtr<layers::KnowsCompositor> mImageAllocator;
   RefPtr<layers::ImageContainer> mImageContainer;
   RefPtr<TaskQueue> mTaskQueue;
 
   // Theora header & decoder state
   th_info mTheoraInfo;
   th_comment mTheoraComment;
   th_setup_info *mTheoraSetupInfo;
   th_dec_ctx *mTheoraDecoderContext;