message: Metal: Fix MSAA workaround texture being leaked.
diff: @@ -990,6 +990,8 @@ namespace dawn_native { namespace metal {
  CopyIntoTrueResolveTarget(commandContext, trueResolveTextures[i],
  trueResolveLevels[i], trueResolveSlices[i],
  temporaryResolveTextures[i], width, height);
  + [temporaryResolveTextures[i] release];
  + temporaryResolveTextures[i] = nil;
  }
  return;
  }
  