[ObjC ARC] Converts ios/web:core to ARC.Automatically generated ARCMigrate commitNotable issues:…

ios/web/BUILD.gn

Index: ios/web/BUILD.gn
diff --git a/ios/web/BUILD.gn b/ios/web/BUILD.gn
index d2b37d673589d11d4ef636bebcaa48ea8af57f50..5c52ec50adc4cf414eb7192a02d4f5129c5ab8f6 100644
--- a/ios/web/BUILD.gn
+++ b/ios/web/BUILD.gn
@@ -303,6 +303,7 @@ source_set("web") {
 }
 
 source_set("core") {
+  configs += [ "//build/config/compiler:enable_arc" ]
   deps = [
     "//base",
     "//url",
@@ -311,8 +312,8 @@ source_set("core") {
   sources = [
     "crw_network_activity_indicator_manager.h",
     "crw_network_activity_indicator_manager.mm",
+    "history_state_util.cc",
     "history_state_util.h",
-    "history_state_util.mm",
   ]
 }