miscellaneous Windows XP fixes

dom/media/fmp4/MP4Decoder.cpp

@@ -52,14 +52,6 @@ IsWhitelistedH264Codec(const nsAString& aCodec)
     return false;
   }
 
-#ifdef XP_WIN
-  // Disable 4k video on windows vista since it performs poorly.
-  if (!IsWin7OrLater() &&
-      level >= H264_LEVEL_5) {
-    return false;
-  }
-#endif
-
   // Just assume what we can play on all platforms the codecs/formats that
   // WMF can play, since we don't have documentation about what other
   // platforms can play... According to the WMF documentation:

dom/media/gtest/MockMediaDecoderOwner.h

@@ -34,8 +34,10 @@ public:
   void DownloadProgressed() override {}
   void UpdateReadyState() override {}
   void FirstFrameLoaded() override {}
+#ifdef MOZ_EME
   void DispatchEncrypted(const nsTArray<uint8_t>& aInitData,
                          const nsAString& aInitDataType) override {}
+#endif
   bool IsActive() const override { return true; }
   bool IsHidden() const override { return false; }
   void DownloadSuspended() override {}