Upstream web_controller_provider and dependencies

ios/web/ios_web.gyp

Index: ios/web/ios_web.gyp
diff --git a/ios/web/ios_web.gyp b/ios/web/ios_web.gyp
index 6abaacf75eb9e6a4d0eebe7116f34e47b914d1e2..66f1c0f92cd33c95ad9fbee979ec19e591e81b0a 100644
--- a/ios/web/ios_web.gyp
+++ b/ios/web/ios_web.gyp
@@ -57,6 +57,8 @@
         'web_state/js/crw_js_message_dynamic_manager.h',
         'web_state/js/crw_js_message_dynamic_manager.mm',
         'web_state/js/crw_js_message_manager.mm',
+        'web_state/ui/web_view_js_utils.h',
+        'web_state/ui/web_view_js_utils.mm',
         'web_state/web_state_observer.cc',
         'web_thread.cc',
         'web_thread_impl.cc',
@@ -64,6 +66,13 @@
         'web_view_util.h',
         'web_view_util.mm',
       ],
+      'link_settings': {
+        'xcode_settings': {
+          'OTHER_LDFLAGS': [
+            '-weak_framework WebKit',
+          ]
+        },
+      },
     },
     {
       'target_name': 'js_resources',