Disable all the failing 3g tests of loading.mobile benchmark

After https://chromium.googlesource.com/catapult.git/+/484f9f764dc58973a0466e4bdf1bfd50c75165e2 fix to set the correct value of traffic settings (and makes each of them 1024X slower),
many 3g tests are timed out after 166s.

For now disabling all those tests. Future fix would probably replace these with
better traffic settings like REGULAR_4G or Wifi.


NOTRY=true
TBR=kouhei@chromium.org, ksakamoto@chromium.org

Bug: 859597
Change-Id: I311d598c5e7e83475a5558c5f53d4a9953559a9d
Reviewed-on: https://chromium-review.googlesource.com/1126079Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#572545}

tools/perf/expectations.config

@@ -86,6 +86,19 @@ crbug.com/857108 [ Nexus_5 ] loading.mobile/G1_3g [ Skip ]
 [ Nexus_5X ] loading.mobile/Hongkiat [ Skip ]
 [ Nexus_5X ] loading.mobile/Dramaq [ Skip ]
 [ Nexus_7 ] loading.mobile/Facebook [ Skip ]
+[ All ] loading.mobile/Bradesco_3g [ Skip ]
+[ All ] loading.mobile/Dailymotion_3g [ Skip ]
+[ All ] loading.mobile/Dawn_3g [ Skip ]
+[ All ] loading.mobile/FlipKart_cold_3g [ Skip ]
+[ All ] loading.mobile/G1_3g [ Skip ]
+[ All ] loading.mobile/GSShop_3g [ Skip ]
+[ All ] loading.mobile/GoogleIndia_3g [ Skip ]
+[ All ] loading.mobile/KapanLagi_3g [ Skip ]
+[ All ] loading.mobile/Kaskus_3g [ Skip ]
+[ All ] loading.mobile/LocalMoxie_3g [ Skip ]
+[ All ] loading.mobile/Thairath_3g [ Skip ]
+[ All ] loading.mobile/TheStar_3g [ Skip ]
+[ All ] loading.mobile/YahooNews_3g [ Skip ]
 
 # Benchmark: memory.long_running_idle_gmail_tbmv2
 crbug.com/611167 [ Android_Svelte ] memory.long_running_idle_gmail_tbmv2/* [ Skip ]