import changes from `dev' branch of rmottola/Arctic-Fox:

- Bug 1206977: P1. Remove unused PDM function members. r=cpearce (3ff104135b)
- Bug 1193670: P1. Remove use of SharedDecoderManager. r=cpearce (adb5606e3e)
- Bug 1193670: P2. Remove use of SharedDecoderManager from MediaDecoderReader. r=cpearce (61b9170c51)
- Bug 1194612: P1. Dont reject init promise when initialising H264Converter. r=alfredo (d7d9e81361)
- Bug 1194612: P2. Don't drop first sample with SPS/PPS NALs. r=alfredo (ea42652155)
- Bug 1194612: P3. Remove redundant member. r=alfredo (2d30f940c9)
- Bug 1195625 - Use correct TaskQueue in SharedDecoderManager and H264Converter promise. r=jya (87e52cd322)
- Bug 1194518 - Part 1: Passthrough decoder wrapper, useful to spy on MediaFormatReader-decoder calls. r=jya (8e6f7df905)
- Bug 1194518 - Part 2: Using passthrough wrapper if pref 'media.fuzz.vdeo-decode-passthrough' is true. r=jya (2a50be71f0)
- Bug 1194518 - Part 3: Delaying decoder wrapper, ensures a decoder appears consistently slow. r=jya (9d461352e5)
- Bug 1194518 - Part 4: Using delaying wrapper according to pref 'media.fuzz.video-decode-minimum-frame-interval-ms'. r=jya (9ec9684024)
- Bug 1194518 - Part 5: Using std::deque instead of nsTArray to store delayed frames. r=jya (6f3f26578c)
- Bug 1197145 - Added BaseTimeDuration::IsZero(), BaseTimeDuration::operator bool(), TimeStamp::operator bool(). r=nfroyd (1ba008c9fa)
- Bug 1202556 - Detect underflow in TimeStamp addition/subtraction operators; r=froydnj (864a288877)
- Bug 1176731 - Don't mark static inline functions as MFBT_API in TimeStamp.h. r=Waldo (6c94439c61)
- bug 1170586 - Make TimeStamp::FromSystemTime available on iOS. r=froydnj (f9ae7bd8b8)
- Bug 1193670: P3. Remove no longer needed SharedDecoderManager class. r=cpearce (c56ef98e6d)
- Bug 1206977: P2. Wrap PDM creation in a new PDMFactory class. r=cpearce (6425ab58ca)
- Bug 1206977: P3. Allow PDM fallback. r=cpearce (6cce420063)
- Bug 1206977: P4. Add AgnosticDecoderModule object. r=cpearce (1d4581f74c)
- Bug 1206977: P5. Update PlatformDecoderModule documentation. r=cpearce (af14651d29)
- Bug 1206977: P6. Make PlatformDecoderModule::SupportsMimeType pure virtual. r=cpearce (f328eb0a48)
- Bug 1146086: Properly marking overridden member with override keyword. a=bustage (c809b2311c)
- Bug 1204776: P1. Have the PlatformDecoderModules use their own log. r=cpearce (b8565d268b)
- Bug 1204776: P2. Make Apple PDM use PlatformDecoderModule log. r=cpearce (74b9985af8)
- Bug 1204776: P3. Have FFmpeg PDM use PlatformDecoderModule log. r=cpearce (caa498a139)
- Bug 1204776: P4. Have VPX/Opus/Vorbis decoder use PlatformDecoderModule log. r=cpearce (f2fce6c79a)
- fix (215c918930)
- Bug 1206977: [webm] P7. Remove IntelWebMVideoDecoder. r=kinetik (c455347fe1)
- Bug 1206977: P8. Have PDMFactory directly manage the EMEDecoderModule. r=cpearce (d830cbe570)
- Bug 1212164: Prevent use of demuxer before initialization completes. r=cpearce (99c268d31d)
- Bug 1152652: Part1. Use mStandardMozillaStyle for crypto classes. r=edwin (af58e4e822)
- Bug 1206977: P9. Ensure PDMs are only ever created through the PDMFactory. r=cpearce (4d7375ea3d)
- Bug 1206977: P10. Remove redundant code. r=cpearce (8abd18ffe1)
- Bug 1206977: P11. Don't rely on SupportsMimeType to determine if a track can be played. r=cpearce (b569a8f5e1)
- Bug 1212246. Part 1 - remove the aBorrowedTaskQueue parameter from the MediaDecoderReader constructor. r=jya. (0f481aa22b)
- Bug 1212246. Part 2 - remove mTaskQueueIsBorrowed and unnecessary checks for mTaskQueue is never null. r=jya. (27ec74d634)
- Bug 1212723. Part 1 - don't share mBufferedState per bug 1212723 comment 6. r=jya. (59e1b89bee)
- Bug 1212723. Part 2 - remove unused argument aCloneDonor from MediaDecoderReader::Init(). r=jya. (45bc778f41)

dom/media/platforms/agnostic/BlankDecoderModule.cpp

@@ -251,11 +251,6 @@ public:
     return true;
   }
 
-  bool
-  SupportsSharedDecoders(const VideoInfo& aConfig) const override {
-    return false;
-  }
-
   ConversionRequired
   DecoderNeedsConversion(const TrackInfo& aConfig) const override
   {
@@ -264,27 +259,10 @@ public:
 
 };
 
-class AgnosticDecoderModule : public BlankDecoderModule {
-public:
-
-  bool SupportsMimeType(const nsACString& aMimeType) override
-  {
-    // This module does not support any decoders itself,
-    // agnostic decoders are created in PlatformDecoderModule::CreateDecoder
-    return false;
-  }
-};
-
 already_AddRefed<PlatformDecoderModule> CreateBlankDecoderModule()
 {
   nsRefPtr<PlatformDecoderModule> pdm = new BlankDecoderModule();
   return pdm.forget();
 }
 
-already_AddRefed<PlatformDecoderModule> CreateAgnosticDecoderModule()
-{
-  nsRefPtr<PlatformDecoderModule> adm = new AgnosticDecoderModule();
-  return adm.forget();
-}
-
 } // namespace mozilla