              'events/EventInit.idl',
              'events/EventListenerOptions.idl',
              'events/EventModifierInit.idl',
-@@ -3837,6 +3842,8 @@
+@@ -3839,6 +3844,8 @@
              '<(blink_core_output_dir)/events/DragEventInit.h',
              '<(blink_core_output_dir)/events/ErrorEventInit.cpp',
              '<(blink_core_output_dir)/events/ErrorEventInit.h',

index 0000000..6c950c8
Binary files /dev/null and b/third_party/WebKit/LayoutTests/http/tests/ironframe/tile.gif differ
diff --git a/third_party/WebKit/Source/core/core.gypi b/third_party/WebKit/Source/core/core.gypi
index 1e1a01c..3a96f2b 100644
--- a/third_party/WebKit/Source/core/core.gypi
+++ b/third_party/WebKit/Source/core/core.gypi
@@ -131,6 +131,7 @@

 
             DCHECK(lifecycle().state() >= DocumentLifecycle::CompositingClean);
diff --git a/third_party/WebKit/Source/core/frame/UseCounter.h b/third_party/WebKit/Source/core/frame/UseCounter.h
index fc6a5e8..62add1c 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.h
+++ b/third_party/WebKit/Source/core/frame/UseCounter.h
@@ -1282,6 +1282,8 @@ public:
 
         PerformanceResourceTimingSizes = 1478,
 
+        DocumentCreateEventRequestedVisibilityEvent = 1500,
+
