[base] Change #include for base::Contains [1/5]

This is a mechanical change replacing #includes of base/stl_util.h
with base/containers/contains.h for usages of base::Contains.

TBR=dcheng

Bug: 970209
Change-Id: Iba94204e7cfd1266a3577fdc0854f1c0891c75b6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2580880
Commit-Queue: Jan Wilken Dörrie <[email protected]>
Reviewed-by: Daniel Cheng <[email protected]>
Cr-Commit-Position: refs/heads/master@{#835286}
diff --git a/chrome/browser/client_hints/client_hints_browsertest.cc b/chrome/browser/client_hints/client_hints_browsertest.cc
index 246b4ef2..ae08e5bd 100644
--- a/chrome/browser/client_hints/client_hints_browsertest.cc
+++ b/chrome/browser/client_hints/client_hints_browsertest.cc
@@ -7,9 +7,9 @@
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
+#include "base/containers/contains.h"
 #include "base/metrics/field_trial_param_associator.h"
 #include "base/run_loop.h"
-#include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/synchronization/lock.h"
 #include "base/test/metrics/histogram_tester.h"