[ios] Simplifies the Find In Page JS unittest.

ios/chrome/browser/find_in_page/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.
 
 import("//ios/web/js_compile.gni")
 
 source_set("find_in_page") {
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
     "find_in_page_controller.h",
@@ skipping 23 matching lines @@
 }
 
 source_set("unit_tests") {
   testonly = true
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
     "find_tab_helper_unittest.mm",
   ]
   deps = [
     ":find_in_page",
+    ":unit_tests_nonarc",
+    "//base",
+    "//ios/web",
+    "//ios/web:test_support",
+    "//testing/gtest",
+  ]
+}
+
+source_set("unit_tests_nonarc") {
+  testonly = true
+  sources = [
+    "find_in_page_js_unittest.mm",
+    "js_findinpage_manager_unittest.mm",
+  ]
+  deps = [
+    ":find_in_page",
     "//base",
+    "//base/test:test_support",
+    "//ios/chrome/browser/web:test_support",
     "//ios/web",
     "//ios/web:test_support",
+    "//testing/gtest",
   ]
 }