tools/perf: Disable rendering.mobile/webgl_to_texture on android-webview.

Failing on the bots, see bug.

Change-Id: I01427f5933b4fe7633d264e830a93b328bd0ac5f
No-Try: True
TBR: wenbinzhang@google.com
Bug: 1116469
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2356344Reviewed-by: Eric Seckler <eseckler@chromium.org>
Commit-Queue: Eric Seckler <eseckler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798110}

tools/perf/expectations.config

@@ -251,6 +251,7 @@ crbug.com/967809 [ android-webview ] rendering.mobile/microsoft_video_city [ Ski
 crbug.com/1017244 [ mobile ] rendering.mobile/youtube_2018 [ Skip ]
 crbug.com/1036357 [ android-nexus-5 ] rendering.mobile/idle_power_blank [ Skip ]
 crbug.com/1036357 [ android-nexus-5 ] rendering.mobile/balls_svg_animations [ Skip ]
+crbug.com/1116469 [ android-webview ] rendering.mobile/webgl_to_texture [ Skip ]
 
 # Benchmark: rasterize_and_record_micro.top_25
 crbug.com/764543 rasterize_and_record_micro.top_25/file://static_top_25/wikipedia.html [ Skip ]