Revert "[tools/perf] Disable browse:chrome:* stories"

This reverts commit b1c0b554.

Reason for revert: Stories show work now after fix of underlying issue.

Original change's description:
> [tools/perf] Disable browse:chrome:* stories
> 
> These stories ara failing with an unhandleable error, preventing the
> rest of the benchmark to run.
> 
> Disable these as a short term quick fix.
> 
> NOTRY=true
> TBR=nednguyen@google.com
> 
> Bug: 900909
> Change-Id: I8e51ced1644853469ff8310de03cb232abba9253
> Reviewed-on: https://chromium-review.googlesource.com/c/1311924
> Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
> Commit-Queue: Juan Antonio Navarro Pérez <perezju@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#604564}

TBR=perezju@chromium.org,nednguyen@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 900909
Change-Id: Ia698d28b432cc0606e0bb157124c2dd39ca3eff0
Reviewed-on: https://chromium-review.googlesource.com/c/1327561Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
Commit-Queue: Juan Antonio Navarro Pérez <perezju@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606602}

tools/perf/expectations.config

@@ -227,8 +227,6 @@ crbug.com/846022 [ Linux ] system_health.common_desktop/browse:social:twitter_in
 crbug.com/903417 [ Mac ] system_health.common_desktop/long_running:tools:gmail-foreground [ Skip ]
 
 # Benchmark: system_health.common_mobile
-crbug.com/900909 [ Android ] system_health.common_mobile/browse:chrome:omnibox [ Skip ]
-crbug.com/900909 [ Android ] system_health.common_mobile/browse:chrome:newtab [ Skip ]
 crbug.com/714650 [ Android ] system_health.common_mobile/browse:news:globo [ Skip ]
 crbug.com/787001 [ Android_Webview ] system_health.common_mobile/load:media:soundcloud [ Skip ]
 crbug.com/708300 [ Android ] system_health.common_mobile/browse:shopping:flipkart [ Skip ]
@@ -262,8 +260,6 @@ crbug.com/799734 [ Win ] system_health.memory_desktop/browse:media:tumblr [ Skip
 crbug.com/899887 [ Linux ] system_health.memory_desktop/browse:social:facebook_infinite_scroll:2018 [ Skip ]
 
 # Benchmark: system_health.memory_mobile
-crbug.com/900909 [ Android ] system_health.memory_mobile/browse:chrome:omnibox [ Skip ]
-crbug.com/900909 [ Android ] system_health.memory_mobile/browse:chrome:newtab [ Skip ]
 crbug.com/787001 [ Android_Webview ] system_health.memory_mobile/load:media:soundcloud [ Skip ]
 [ Android_Webview ] system_health.memory_mobile/browse:chrome:newtab [ Skip ]
 crbug.com/847786 [ Android_One ] system_health.memory_mobile/browse:chrome:newtab [ Skip ]
@@ -344,8 +340,6 @@ crbug.com/860847 [ Win ] v8.browsing_desktop-future/browse:news:reddit [ Skip ]
 crbug.com/773084 [ Mac ] v8.browsing_desktop-future/browse:tools:maps [ Skip ]
 
 # Benchmark: v8.browsing_mobile
-crbug.com/900909 [ Android ] v8.browsing_mobile/browse:chrome:omnibox [ Skip ]
-crbug.com/900909 [ Android ] v8.browsing_mobile/browse:chrome:newtab [ Skip ]
 crbug.com/714650 [ Android ] v8.browsing_mobile/browse:news:globo [ Skip ]
 crbug.com/767970 [ Android ] v8.browsing_mobile/browse:shopping:flipkart [ Skip ]
 crbug.com/708300 [ Android ] v8.browsing_mobile/browse:shopping:flipkart [ Skip ]
@@ -359,8 +353,6 @@ crbug.com/877648 [ Android_Go ] v8.browsing_mobile/browse:news:cnn [ Skip ]
 crbug.com/901967 [ Nexus6_Webview ] v8.browsing_mobile/browse:news:toi [ Skip ]
 
 # Benchmark: v8.browsing_mobile-future
-crbug.com/900909 [ Android ] v8.browsing_mobile-future/browse:chrome:omnibox [ Skip ]
-crbug.com/900909 [ Android ] v8.browsing_mobile-future/browse:chrome:newtab [ Skip ]
 crbug.com/714650 [ Android ] v8.browsing_mobile-future/browse:news:globo [ Skip ]
 crbug.com/767970 [ Android ] v8.browsing_mobile-future/browse:shopping:flipkart [ Skip ]
 crbug.com/708300 [ Android ] v8.browsing_mobile-future/browse:shopping:flipkart [ Skip ]