Move part of browsing data counter text util method to components

components/browsing_data/core/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 static_library("core") {
   sources = [
@@ skipping 10 matching lines @@
     "pref_names.cc",
     "pref_names.h",
   ]
 
   deps = [
     "//base",
     "//components/autofill/core/browser",
     "//components/history/core/browser",
     "//components/password_manager/core/browser",
     "//components/prefs:prefs",
+    "//components/strings",
     "//components/sync",
     "//components/webdata/common",
+    "//ui/base",
   ]
 }
 
 if (is_android) {
   # GYP: //components/browsing_data.gypi:browsing_data_utils_java
   java_cpp_enum("browsing_data_utils_java") {
     sources = [
       "browsing_data_utils.h",
     ]
   }
 }
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "browsing_data_utils_unittest.cc",
+  ]
+
+  deps = [
+    ":core",
+    "//base",
+    "//components/autofill/core/browser:browser",
+    "//testing/gtest",
+  ]
+}