Bug 1542539 - MediaData::ValidateBufferAndPicture warns on 0 by 0 dimension data instead of asserting. r=jya

Warn instead of asserting since it's possible for decoders to give us 0 by 0
frames here.

Differential Revision: https://phabricator.services.mozilla.com/D26612

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

dom/media/MediaData.cpp

@@ -186,8 +186,7 @@ static bool ValidateBufferAndPicture(const VideoData::YCbCrBuffer& aBuffer,
 
   // The following situations could be triggered by invalid input
   if (aPicture.width <= 0 || aPicture.height <= 0) {
-    // In debug mode, makes the error more noticeable
+    NS_WARNING("Empty picture rect");
-    MOZ_ASSERT(false, "Empty picture rect");
     return false;
   }
   if (!ValidatePlane(aBuffer.mPlanes[0]) ||