  
              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
+index 29e309c..f2d5c35 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,
+@@ -1283,6 +1283,8 @@ public:
+         EventSourceDocument = 1479,
+         EventSourceWorker = 1480,
  
 +        DocumentCreateEventRequestedVisibilityEvent = 1500,
 +

 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index e315c07..ac630ba 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -3913,7 +3913,6 @@ void Document::enqueueAnimationFrameEvent(Event* event)
 void Document::enqueueRequestedVisibilityEvent(const String& msg)
 {
     RequestedVisibilityEvent* event = RequestedVisibilityEvent::create(msg);

+    DOMString message;
+};
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index 0080819..b5bf97f 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -40,6 +40,7 @@
