Remove NOTIFICATION_RENDER_VIEW_HOST_CHANGED.

content/public/browser/notification_types.h

Index: content/public/browser/notification_types.h
diff --git a/content/public/browser/notification_types.h b/content/public/browser/notification_types.h
index 08ffd3306deb7b45e2e9abae753aa9ecf0b7ddbf..a704315387c86dcdeaa74cf1f6131b631b808e5f 100644
--- a/content/public/browser/notification_types.h
+++ b/content/public/browser/notification_types.h
@@ -112,13 +112,6 @@ enum NotificationType {
   // DEPRECATED: Use WebContentsObserver::RenderViewReady()
   NOTIFICATION_WEB_CONTENTS_CONNECTED,
 
-  // This notification is sent when a WebContents swaps its render view host
-  // with another one, possibly changing processes. The source is a
-  // Source<WebContents> with a pointer to the WebContents, details is a
-  // std::pair::<old RenderViewHost, new RenderViewHost>.
-  // DEPRECATED: Use WebContentsObserver::RenderViewHostChanged()
-  NOTIFICATION_RENDER_VIEW_HOST_CHANGED,
-
   // This message is sent after a WebContents is disconnected from the
   // renderer process.  The source is a Source<WebContents> with a pointer to
   // the WebContents (the pointer is usable).  No details are expected.