PlzNavigate: Clear provisional history item on redirects.

third_party/WebKit/public/web/WebDataSource.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 90 matching lines @@
     // navigation start is determined in WebCore. But, in some situations,
     // the embedder might have a better value and can override it here. This
     // should be called before WebFrameClient::didCommitProvisionalLoad.
     // Calling it later may confuse users, because JavaScript may have run and
     // the user may have already recorded the original value.
     virtual void setNavigationStartTime(double) = 0;
 
     // Sets timing and attributes of the navigation.
     // Ordinarily, they are determined in WebCore, but when the navigation is
     // handled by the client, they can be passed here.
-    virtual void updateNavigationTimings(double redirectStartTime, double redirectEndTime, double fetchStartTime, const WebVector<WebURL>& redirectChain) = 0;
+    virtual void updateNavigation(double redirectStartTime, double redirectEndTime, double fetchStartTime, const WebVector<WebURL>& redirectChain) = 0;
 
     // Allows the embedder to inject a filter that will be consulted for each
     // subsequent subresource load, and gets the final say in deciding whether
     // or not to allow the load. The passed-in filter object is deleted when the
     // datasource is destroyed or when a new filter is set.
     virtual void setSubresourceFilter(WebDocumentSubresourceFilter*) = 0;
 
 protected:
     ~WebDataSource() { }
 };
 
 } // namespace blink
 
 #endif