Convert //ios/web_view/internal to ARC.

ios/web_view/internal/BUILD.gn

Index: ios/web_view/internal/BUILD.gn
diff --git a/ios/web_view/internal/BUILD.gn b/ios/web_view/internal/BUILD.gn
index d5f4c6cb1827fd4d9260cb49ee24b78b776a546b..851617bfde39f2bbb04fba89c9eefdbf1f67ce22 100644
--- a/ios/web_view/internal/BUILD.gn
+++ b/ios/web_view/internal/BUILD.gn
@@ -2,26 +2,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-source_set("internal_arc") {
-  visibility = [
-    "//ios/web_view",
-    "//ios/web_view/internal/*",
-  ]
-
-  sources = [
-    "criwv_web_view_configuration.mm",
-    "criwv_website_data_store.mm",
-    "criwv_website_data_store_internal.h",
-  ]
-
-  deps = [
-    "//ios/web/public/app",
-    "//ios/web_view/public",
-  ]
-
-  configs += [ "//build/config/compiler:enable_arc" ]
-}
-
 source_set("internal") {
   visibility = [
     "//ios/web_view",
@@ -43,6 +23,9 @@ source_set("internal") {
     "criwv_web_main_parts.h",
     "criwv_web_main_parts.mm",
     "criwv_web_view.mm",
+    "criwv_web_view_configuration.mm",
+    "criwv_website_data_store.mm",
+    "criwv_website_data_store_internal.h",
     "pref_names.cc",
     "pref_names.h",
   ]
@@ -64,12 +47,7 @@ source_set("internal") {
     "//url",
   ]
 
-  public_deps = [
-    ":internal_arc",
-  ]
+  allow_circular_includes_from = [ "//ios/web_view/internal/translate" ]
 
-  allow_circular_includes_from = [
-    ":internal_arc",
-    "//ios/web_view/internal/translate",
-  ]
+  configs += [ "//build/config/compiler:enable_arc" ]
 }