[ARC] Converts part of ios/web/ui to ARC.

ios/web/BUILD.gn

Index: ios/web/BUILD.gn
diff --git a/ios/web/BUILD.gn b/ios/web/BUILD.gn
index d00057391e2136b4c0c3fe76a241748c8a9daa79..54ceedc4b8c525f2ceec2b16a1bd460de671eb06 100644
--- a/ios/web/BUILD.gn
+++ b/ios/web/BUILD.gn
@@ -97,6 +97,21 @@ source_set("web_arc") {
     "web_thread_impl.cc",
     "web_thread_impl.h",
     "web_view_creation_util.mm",
+    "webui/crw_web_ui_manager.h",
+    "webui/crw_web_ui_manager.mm",
+    "webui/crw_web_ui_page_builder.h",
+    "webui/crw_web_ui_page_builder.mm",
+    "webui/mojo_facade.h",
+    "webui/mojo_facade.mm",
+    "webui/mojo_js_constants.cc",
+    "webui/mojo_js_constants.h",
+    "webui/shared_resources_data_source_ios.h",
+    "webui/shared_resources_data_source_ios.mm",
+    "webui/url_data_manager_ios.cc",
+    "webui/url_data_manager_ios.h",
+    "webui/url_data_manager_ios_backend.h",
+    "webui/url_data_manager_ios_backend.mm",
+    "webui/url_data_source_ios.mm",
   ]
 
   libs = [ "WebKit.framework" ]
@@ -267,21 +282,6 @@ source_set("web") {
     "web_state/web_view_internal_creation_util.mm",
     "web_state/wk_web_view_security_util.h",
     "web_state/wk_web_view_security_util.mm",
-    "webui/crw_web_ui_manager.h",
-    "webui/crw_web_ui_manager.mm",
-    "webui/crw_web_ui_page_builder.h",
-    "webui/crw_web_ui_page_builder.mm",
-    "webui/mojo_facade.h",
-    "webui/mojo_facade.mm",
-    "webui/mojo_js_constants.cc",
-    "webui/mojo_js_constants.h",
-    "webui/shared_resources_data_source_ios.h",
-    "webui/shared_resources_data_source_ios.mm",
-    "webui/url_data_manager_ios.cc",
-    "webui/url_data_manager_ios.h",
-    "webui/url_data_manager_ios_backend.h",
-    "webui/url_data_manager_ios_backend.mm",
-    "webui/url_data_source_ios.mm",
     "webui/url_data_source_ios_impl.cc",
     "webui/url_data_source_ios_impl.h",
     "webui/url_fetcher_block_adapter.h",