  
              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 d81e597..9e1690f 100644
+index a4add5b..3b08b93 100644
 --- a/third_party/WebKit/Source/core/frame/UseCounter.h
 +++ b/third_party/WebKit/Source/core/frame/UseCounter.h
-@@ -1304,6 +1304,9 @@ public:
-         UsbDeviceIsochronousTransferOut = 1533,
-         UsbDeviceReset = 1534,
+@@ -1308,6 +1308,9 @@ public:
+         PointerEnterLeaveFiredWhileCaptured = 1537,
+         PointerOverOutFiredWhileCaptured = 1538,
  
 +        DocumentCreateEventRequestedVisibilityEvent = 1600,
 +

             '<(blink_core_output_dir)/events/EventInit.h',
             '<(blink_core_output_dir)/events/EventListenerOptions.cpp',
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index c3cbd26..a69cbad 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -26,6 +26,7 @@

 create mode 100644 third_party/WebKit/Source/core/events/RequestedVisibilityEventInit.idl

diff --git a/third_party/WebKit/Source/core/core.gypi b/third_party/WebKit/Source/core/core.gypi
index 506adb8..4c21e53 100644
--- a/third_party/WebKit/Source/core/core.gypi
+++ b/third_party/WebKit/Source/core/core.gypi
@@ -134,6 +134,7 @@
