          // numbers of any item, and don't reuse removed slots.
          // Also, run update_use_counter_feature_enum.py in chromium/src/tools/metrics/histograms/
 diff --git a/third_party/WebKit/Source/core/layout/LayoutView.cpp b/third_party/WebKit/Source/core/layout/LayoutView.cpp
-index 0020318..6f2a127 100644
+index b8bd622..5662710 100644
 --- a/third_party/WebKit/Source/core/layout/LayoutView.cpp
 +++ b/third_party/WebKit/Source/core/layout/LayoutView.cpp
 @@ -24,7 +24,9 @@

             'events/EventInit.idl',
             'events/EventListenerOptions.idl',
             'events/EventModifierInit.idl',
@@ -3881,6 +3886,8 @@
             '<(blink_core_output_dir)/events/DragEventInit.h',
             '<(blink_core_output_dir)/events/ErrorEventInit.cpp',
             '<(blink_core_output_dir)/events/ErrorEventInit.h',

+    DOMString message;
+};
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index bb4e1e1..55a7fcd 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -41,6 +41,7 @@
