[ObjC ARC] Converts ios/chrome/browser/webp_transcode:unit_tests to ARC.Automatically generated A…

ios/chrome/browser/webp_transcode/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.
 
 source_set("webp_transcode") {
   sources = [
     "webp_decoder.h",
     "webp_decoder.mm",
   ]
   deps = [
     "//base",
     "//third_party/libwebp:libwebp_dec",
   ]
 }
 
 source_set("unit_tests") {
+  configs += [ "//build/config/compiler:enable_arc" ]
   testonly = true
   sources = [
     "webp_decoder_unittest.mm",
   ]
   deps = [
     ":webp_transcode",
     ":webp_transcode_unit_tests_bundle_data",
     "//base",
     "//testing/gmock",
     "//testing/gtest",
@@ skipping 10 matching lines @@
     "//ios/chrome/test/data/webp_transcode/test_alpha.png",
     "//ios/chrome/test/data/webp_transcode/test_alpha.webp",
     "//ios/chrome/test/data/webp_transcode/test_small.tiff",
     "//ios/chrome/test/data/webp_transcode/test_small.webp",
   ]
   outputs = [
     "{{bundle_resources_dir}}/{{source_root_relative_dir}}/" +
         "{{source_file_part}}",
   ]
 }