[ObjC ARC] Converts ios/chrome/browser/find_in_page:unit_tests_nonarc to ARC.

ios/chrome/browser/find_in_page/BUILD.gn

Index: ios/chrome/browser/find_in_page/BUILD.gn
diff --git a/ios/chrome/browser/find_in_page/BUILD.gn b/ios/chrome/browser/find_in_page/BUILD.gn
index ff13a5183d686137d531f0d956901ebf63fa0ac2..88e20e3dc3aaaa26ce04100a11fc008dea5b043f 100644
--- a/ios/chrome/browser/find_in_page/BUILD.gn
+++ b/ios/chrome/browser/find_in_page/BUILD.gn
@@ -37,11 +37,12 @@ source_set("unit_tests") {
   testonly = true
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
+    "find_in_page_js_unittest.mm",
     "find_tab_helper_unittest.mm",
+    "js_findinpage_manager_unittest.mm",
   ]
   deps = [
     ":find_in_page",
-    ":unit_tests_nonarc",
     "//base",
     "//base/test:test_support",
     "//ios/chrome/browser/web:test_support",
@@ -51,19 +52,3 @@ source_set("unit_tests") {
     "//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",
-    "//testing/gtest",
-  ]
-}