[counters] Disable slow histograms by default

All the flags are in place and we can disable the slow histogram to
fix the expected regression we see on the perf bots.

Bug: v8:11946, chromium:1238515
Change-Id: I063582b4dede32bf90b5d5d94ba3a9dfd9f56718
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3089155
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#76245}

src/flags/flag-definitions.h

@@ -1789,7 +1789,8 @@ DEFINE_BOOL_READONLY(minor_mc, false,
 
 DEFINE_BOOL(help, false, "Print usage message, including flags, on console")
 DEFINE_BOOL(dump_counters, false, "Dump counters on exit")
-DEFINE_BOOL(slow_histograms, true, "Enable slow histograms with more overhead.")
+DEFINE_BOOL(slow_histograms, false,
+            "Enable slow histograms with more overhead.")
 DEFINE_IMPLICATION(dump_counters, slow_histograms)
 
 DEFINE_BOOL(dump_counters_nvp, false,