Refactor the API for setting dynamic resource load priorities

Source/core/fetch/ResourceLoader.h

 /*
  * Copyright (C) 2005, 2006, 2011 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
@@ skipping 51 matching lines @@
     const ResourceRequest& originalRequest() const { return m_originalRequest; }
 
     void setDefersLoading(bool);
     bool defersLoading() const { return m_defersLoading; }
 
     void attachThreadedDataReceiver(PassRefPtrWillBeRawPtr<ThreadedDataReceiver>);
 
     void releaseResources();
 
     void didChangePriority(ResourceLoadPriority, int intraPriorityValue);
-    bool shouldUseIncreasedPriorities();
 
     // WebURLLoaderClient
     void willSendRequest(WebURLLoader*, WebURLRequest&, const WebURLResponse& redirectResponse) override;
     void didSendData(WebURLLoader*, unsigned long long bytesSent, unsigned long long totalBytesToBeSent) override;
     void didReceiveResponse(WebURLLoader*, const WebURLResponse&) override;
     void didReceiveResponse(WebURLLoader*, const WebURLResponse&, WebDataConsumerHandle*) override;
     void didReceiveData(WebURLLoader*, const char*, int, int encodedDataLength) override;
     void didReceiveCachedMetadata(WebURLLoader*, const char* data, int length) override;
     void didFinishLoading(WebURLLoader*, double finishTime, int64_t encodedDataLength) override;
     void didFail(WebURLLoader*, const WebURLError&) override;
@@ skipping 52 matching lines @@
     ResourceLoaderState m_state;
 
     // Used for sanity checking to make sure we don't experience illegal state
     // transitions.
     ConnectionState m_connectionState;
 };
 
 }
 
 #endif