Remove no_size_t_to_int_warning in components_perftests

Bug: 167187
Change-Id: I532b689de22a7f2dc5b681074707a4eb00d5ba1e
Reviewed-on: https://chromium-review.googlesource.com/966787Reviewed-by: Cait Phillips <caitkp@chromium.org>
Commit-Queue: Charlie Harrison <csharrison@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543832}

components/BUILD.gn

@@ -547,9 +547,6 @@ if (!is_ios) {
       "visitedlink/test/visitedlink_perftest.cc",
     ]
 
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
-
     deps = [
       "//base",
       "//components/discardable_memory/common",