Sync the IDL interfaces in core/frame/ with their many specs

Source/core/frame/History.cpp

 /*
  * Copyright (C) 2007 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 90 matching lines @@
 void History::back(ExecutionContext* context)
 {
     go(context, -1);
 }
 
 void History::forward(ExecutionContext* context)
 {
     go(context, 1);
 }
 
-void History::go(ExecutionContext* context, int distance)
+void History::go(ExecutionContext* context, int delta)
 {
     if (!m_frame || !m_frame->loader().client())
         return;
 
     ASSERT(isMainThread());
     Document* activeDocument = toDocument(context);
     if (!activeDocument)
         return;
 
     if (!activeDocument->frame() || !activeDocument->frame()->canNavigate(*m_frame))
         return;
 
-    if (distance)
-        m_frame->loader().client()->navigateBackForward(distance);
+    if (delta)
+        m_frame->loader().client()->navigateBackForward(delta);
     else
         m_frame->reload(FrameLoadTypeReload, ClientRedirect);
 }
 
 KURL History::urlForState(const String& urlString)
 {
     Document* document = m_frame->document();
 
     if (urlString.isNull())
         return document->url();
@@ skipping 16 matching lines @@
     }
 
     HistoryScrollRestorationType restorationType = ScrollRestorationAuto;
     if (RuntimeEnabledFeatures::scrollRestorationEnabled() && options.scrollRestoration() == "manual")
         restorationType = ScrollRestorationManual;
 
     m_frame->loader().updateForSameDocumentNavigation(fullURL, SameDocumentNavigationHistoryApi, data, restorationType, type);
 }
 
 } // namespace blink