[tools/perf] Remove remaining references to indexeddb_perf benchmark

tools/perf/docs/perf_bot_sheriffing.md

Index: tools/perf/docs/perf_bot_sheriffing.md
diff --git a/tools/perf/docs/perf_bot_sheriffing.md b/tools/perf/docs/perf_bot_sheriffing.md
index 8ecf82a4e571ba112bb5b3c8ed70078423e9a59b..cd93e01933faf2f6177aac63763e7449c7545ef8 100644
--- a/tools/perf/docs/perf_bot_sheriffing.md
+++ b/tools/perf/docs/perf_bot_sheriffing.md
@@ -344,7 +344,7 @@ the [chrome-perf swarming pool](https://chromium-swarm.appspot.com/botlist?c=id&
             `--isolated-script-test-chartjson-output=/b/s/w/ioFB73Qz/chartjson-output.json`
             flags to be a local path
         6.  Example with tmp as locally created dir:
-            `/usr/bin/python ../../testing/scripts/run_telemetry_benchmark_as_googletest.py ../../tools/perf/run_benchmark indexeddb_perf -v --upload-results --output-format=chartjson --browser=release --isolated-script-test-output=tmp/output.json --isolated-script-test-chartjson-output=tmp/chartjson-output.json`
+            `/usr/bin/python ../../testing/scripts/run_telemetry_benchmark_as_googletest.py ../../tools/perf/run_benchmark memory.desktop -v --upload-results --output-format=chartjson --browser=release --isolated-script-test-output=tmp/output.json --isolated-script-test-chartjson-output=tmp/chartjson-output.json`

[perezju, 2017/03/31 12:18:25]

Ned, any other suggestion for a benchmark name to use in the example? Was trying
to find something that is likely to last after the upcoming slimming down, and
hopefully not too difficult to run.

[nednguyen, 2017/03/31 12:20:07]

speedometer is easy to run

     *   ssh into swarming bot and run test on that machine
         1.  NOTE: this should be a last resort since it will cause a fifth of
             the benchmarks to continuously fail on the waterfall