Bug 1596064 - Remove any access on the database when pref is off. r=jya

Differential Revision: https://phabricator.services.mozilla.com/D52984

--HG--
extra : moz-landing-system : lando

dom/media/MediaFormatReader.cpp

@@ -906,6 +906,9 @@ void MediaFormatReader::ShutdownDecoder(TrackType aTrack) {
 
 void MediaFormatReader::NotifyDecoderBenchmarkStore() {
   MOZ_ASSERT(OnTaskQueue());
+  if (!StaticPrefs::media_mediacapabilities_from_database()) {
+    return;
+  }
   auto& decoder = GetDecoderData(TrackInfo::kVideoTrack);
   if (decoder.GetCurrentInfo() && decoder.GetCurrentInfo()->GetAsVideoInfo()) {
     VideoInfo info = *(decoder.GetCurrentInfo()->GetAsVideoInfo());

dom/media/mediacapabilities/DecoderBenchmark.cpp

@@ -7,6 +7,7 @@
 #include "DecoderBenchmark.h"
 #include "mozilla/BenchmarkStorageChild.h"
 #include "mozilla/media/MediaUtils.h"
+#include "mozilla/StaticPrefs_media.h"
 
 namespace mozilla {
 
@@ -214,6 +215,10 @@ void DecoderBenchmark::CheckVersion(const nsACString& aDecoderName) {
     return;
   }
 
+  if (!StaticPrefs::media_mediacapabilities_from_database()) {
+    return;
+  }
+
   nsCString name(aDecoderName);
   int32_t version;
   if (!DecoderVersionTable().Get(name, &version)) {