Add a unique frame id and save it on HistoryItem.

Source/core/inspector/InspectorOverlay.cpp

 /*
  * Copyright (C) 2011 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:
  *
  * 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
@@ skipping 588 matching lines @@
     overlaySettings.setCursiveFontFamily(settings.cursiveFontFamily());
     overlaySettings.setFantasyFontFamily(settings.fantasyFontFamily());
     overlaySettings.setPictographFontFamily(settings.pictographFontFamily());
     overlaySettings.setMinimumFontSize(settings.minimumFontSize());
     overlaySettings.setMinimumLogicalFontSize(settings.minimumLogicalFontSize());
     overlaySettings.setMediaEnabled(false);
     overlaySettings.setScriptEnabled(true);
     overlaySettings.setPluginsEnabled(false);
     overlaySettings.setLoadsImagesAutomatically(true);
 
-    RefPtr<Frame> frame = Frame::create(m_overlayPage.get(), 0, dummyFrameLoaderClient);
+    RefPtr<Frame> frame = Frame::create(FrameInit::create(0, m_overlayPage.get(), dummyFrameLoaderClient));
     frame->setView(FrameView::create(frame.get()));
     frame->init();
     FrameLoader& loader = frame->loader();
     frame->view()->setCanHaveScrollbars(false);
     frame->view()->setTransparent(true);
     ASSERT(loader.activeDocumentLoader());
     DocumentWriter* writer = loader.activeDocumentLoader()->beginWriting("text/html", "UTF-8");
     writer->addData(reinterpret_cast<const char*>(InspectorOverlayPage_html), sizeof(InspectorOverlayPage_html));
     loader.activeDocumentLoader()->endWriting(writer);
     v8::Isolate* isolate = toIsolate(frame.get());
@@ skipping 56 matching lines @@
 }
 
 void InspectorOverlay::freePage()
 {
     m_overlayPage.clear();
     m_overlayChromeClient.clear();
     m_timer.stop();
 }
 
 } // namespace WebCore