Remove some dead code in WebFrame

sky/engine/web/WebLocalFrameImpl.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 61 matching lines @@
     virtual void collectGarbage() override;
     virtual v8::Handle<v8::Value> executeScriptAndReturnValue(
         const WebScriptSource&) override;
     virtual v8::Handle<v8::Value> callFunctionEvenIfScriptDisabled(
         v8::Handle<v8::Function>,
         v8::Handle<v8::Value>,
         int argc,
         v8::Handle<v8::Value> argv[]) override;
     virtual v8::Local<v8::Context> mainWorldScriptContext() const override;
     virtual void load(const WebURL&, mojo::ScopedDataPipeConsumerHandle);
-    virtual void setReferrerForRequest(WebURLRequest&, const WebURL& referrer) override;
-    virtual unsigned unloadListenerCount() const override;
     virtual void replaceSelection(const WebString&) override;
     virtual void insertText(const WebString&) override;
     virtual void setMarkedText(const WebString&, unsigned location, unsigned length) override;
     virtual void unmarkText() override;
     virtual bool hasMarkedText() const override;
     virtual WebRange markedRange() const override;
     virtual bool firstRectForCharacterRange(unsigned location, unsigned length, WebRect&) const override;
     virtual size_t characterIndexForPoint(const WebPoint&) const override;
     virtual bool executeCommand(const WebString&, const WebNode& = WebNode()) override;
     virtual bool executeCommand(const WebString&, const WebString& value, const WebNode& = WebNode()) override;
@@ skipping 68 matching lines @@
     // Stores the additional input events offset and scale when device metrics emulation is enabled.
     IntSize m_inputEventsOffsetForEmulation;
     float m_inputEventsScaleFactorForEmulation;
 };
 
 DEFINE_TYPE_CASTS(WebLocalFrameImpl, WebFrame, frame, frame->isWebLocalFrame(), frame.isWebLocalFrame());
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_WEB_WEBLOCALFRAMEIMPL_H_