Bug 1407810 - Implement HTMLMediaElement::Moz{Enable,Request}DebugLog - r=jwwang

MozReview-Commit-ID: 7Hhy6qBVjDk

dom/html/HTMLMediaElement.cpp

@@ -98,6 +98,7 @@
 #include "nsIContentPolicy.h"
 #include "mozilla/Telemetry.h"
 #include "DecoderDoctorDiagnostics.h"
+#include "DecoderDoctorLogger.h"
 #include "DecoderTraits.h"
 #include "MediaContainerType.h"
 #include "MP4Decoder.h"
@@ -1608,6 +1609,31 @@ HTMLMediaElement::MozRequestDebugInfo(ErrorResult& aRv)
   return promise.forget();
 }
 
+/* static */ void
+HTMLMediaElement::MozEnableDebugLog(const GlobalObject&)
+{
+  DecoderDoctorLogger::EnableLogging();
+}
+
+already_AddRefed<Promise>
+HTMLMediaElement::MozRequestDebugLog(ErrorResult& aRv)
+{
+  RefPtr<Promise> promise = CreateDOMPromise(aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  DecoderDoctorLogger::RetrieveMessages(this)->Then(
+    mAbstractMainThread,
+    __func__,
+    [promise](const nsACString& aString) {
+      promise->MaybeResolve(NS_ConvertUTF8toUTF16(aString));
+    },
+    [promise](nsresult rv) { promise->MaybeReject(rv); });
+
+  return promise.forget();
+}
+
 already_AddRefed<Promise>
 HTMLMediaElement::MozDumpDebugInfo()
 {