    bool displayed_insecure_content_;
  
 diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
-index 27f9af7..d78a0c7 100644
+index 96a3043..3887d3c 100644
 --- a/content/common/frame_messages.h
 +++ b/content/common/frame_messages.h
-@@ -1464,6 +1464,10 @@ IPC_MESSAGE_ROUTED0(FrameHostMsg_DispatchLoad)
+@@ -1456,6 +1456,10 @@ IPC_MESSAGE_ROUTED0(FrameHostMsg_DispatchLoad)
  IPC_MESSAGE_ROUTED1(FrameHostMsg_RouteMessageEvent,
                      FrameMsg_PostMessage_Params)
  

 
             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 a41064e..f46e33d 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.h
+++ b/third_party/WebKit/Source/core/frame/UseCounter.h
@@ -1287,6 +1287,8 @@ public:
         StarInTimingAllowOrigin = 1483,
         SVGSMILAdditiveAnimation = 1484,
 
+        DocumentCreateEventRequestedVisibilityEvent = 1500,
+

     void didRunInsecureContent(SecurityOrigin*, const KURL& insecureURL) override;
     void didDetectXSS(const KURL&, bool didBlockEntirePage) override;
diff --git a/third_party/WebKit/public/web/WebFrameClient.h b/third_party/WebKit/public/web/WebFrameClient.h
index 108c4c7..07631bb 100644
--- a/third_party/WebKit/public/web/WebFrameClient.h
+++ b/third_party/WebKit/public/web/WebFrameClient.h
@@ -479,6 +479,10 @@ public:
