Revert "Disable several failing blink_perf.parser stories on Nexus 5X webview"

This reverts commit 5e32cab2.

Reason for revert: The cause of the failures has (hopefully) been fixed.

Original change's description:
> Disable several failing blink_perf.parser stories on Nexus 5X webview
> 
> NOTRY=true
> TBR=nednguyen@chromium.org
> 
> Bug: 851539
> Change-Id: Ia51f717aa8c7ca47b47007fa4aa5077767a86e91
> Reviewed-on: https://chromium-review.googlesource.com/1095676
> Commit-Queue: Charlie Andrews <charliea@chromium.org>
> Reviewed-by: Charlie Andrews <charliea@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#566043}

Bug: 851539
Change-Id: I69b8f51a4e91171448f6d61c052168deaa3dc222
Reviewed-on: https://chromium-review.googlesource.com/1112181Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#569913}

tools/perf/expectations.config

@@ -45,9 +45,6 @@ crbug.com/799540 [ Nexus_7 ] blink_perf.paint/* [ Skip ]
 
 # Benchmark: blink_perf.parser
 crbug.com/796115 [ Android_One ] blink_perf.parser/html5-full-render.html [ Skip ]
-crbug.com/851539 [ Nexus5X_Webview ] blink_perf.parser/query-selector-all-class-deep.html [ Skip ]
-crbug.com/851539 [ Nexus5X_Webview ] blink_perf.parser/query-selector-all-deep.html [ Skip ]
-crbug.com/851539 [ Nexus5X_Webview ] blink_perf.parser/query-selector-all-id-deep.html [ Skip ]
 
 # Benchmark: blink_perf.shadow_dom
 crbug.com/702319 [ Nexus_5X ] blink_perf.shadow_dom/* [ Skip ]