Histograms: Add missing RendererSchedulerTaskType enum values

The last few task types added to the blink::TaskType enum were not added
to enums.xml causing the raw value to appear in histograms.

Change-Id: I8e2e3b93d939ffd41a68fc3342ef8c390aaa16f6
Reviewed-on: https://chromium-review.googlesource.com/1162914Reviewed-by: Alexander Timin <altimin@chromium.org>
Commit-Queue: Scott Haseley <shaseley@google.com>
Cr-Commit-Position: refs/heads/master@{#580721}

tools/metrics/histograms/enums.xml

@@ -40875,6 +40875,9 @@ Called by update_net_trust_anchors.py.-->
   <int value="46" label="WorkerThreadTaskQueueDefault"/>
   <int value="47" label="WorkerThreadTaskQueueV8"/>
   <int value="48" label="WorkerThreadTaskQueueCompositor"/>
+  <int value="49" label="CompositorThreadTaskQueueInput"/>
+  <int value="50" label="NetworkingWithURLLoaderAnnotation"/>
+  <int value="51" label="WorkerAnimation"/>
 </enum>
 
 <enum name="RendererSchedulerTaskUseCase">