Add RendererSchedulerThreadType values to enum.xml

Change-Id: I5cbbd34ab7804946e73cce9e0fb49678e72dc414
Reviewed-on: https://chromium-review.googlesource.com/1113172Reviewed-by: Alexander Timin <altimin@chromium.org>
Commit-Queue: Hajime Hoshi <hajimehoshi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570018}

tools/metrics/histograms/enums.xml

@@ -39815,6 +39815,14 @@ Called by update_net_trust_anchors.py.-->
   <int value="5" label="AnimationWorkletThread"/>
   <int value="6" label="ServiceWorkerThread"/>
   <int value="7" label="AudioWorkletThread"/>
+  <int value="8" label="FileThread"/>
+  <int value="9" label="DatabaseThread"/>
+  <int value="10" label="WebAudioThread"/>
+  <int value="11" label="ScriptStreamerThread"/>
+  <int value="12" label="OfflineAudioRenderThread"/>
+  <int value="13" label="ReverbConvolutionBackgroundThread"/>
+  <int value="14" label="HRTFDatabaseLoaderThread"/>
+  <int value="15" label="TestThread"/>
 </enum>
 
 <enum name="RendererType">