[Net] Propagate priority changes from URLRequest to HttpTransaction

net/http/http_cache_transaction.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file declares HttpCache::Transaction, a private class of HttpCache so
 // it should only be included by http_cache.cc
 
 #ifndef NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 #define NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 
@@ skipping 106 matching lines @@
   virtual int Read(IOBuffer* buf,
                    int buf_len,
                    const CompletionCallback& callback) OVERRIDE;
   virtual void StopCaching() OVERRIDE;
   virtual void DoneReading() OVERRIDE;
   virtual const HttpResponseInfo* GetResponseInfo() const OVERRIDE;
   virtual LoadState GetLoadState() const OVERRIDE;
   virtual UploadProgress GetUploadProgress(void) const OVERRIDE;
   virtual bool GetLoadTimingInfo(
       LoadTimingInfo* load_timing_info) const OVERRIDE;
+  virtual void SetPriority(RequestPriority priority) OVERRIDE;
 
  private:
+  friend class HttpCacheTransactionTest;
+
   static const size_t kNumValidationHeaders = 2;
   // Helper struct to pair a header name with its value, for
   // headers used to validate cache entries.
   struct ValidationHeaders {
     ValidationHeaders() : initialized(false) {}
 
     std::string values[kNumValidationHeaders];
     bool initialized;
   };
 
@@ skipping 299 matching lines @@
   // For sensitivity analysis, the simulated increase in cache service times,
   // in percent.
   int sensitivity_analysis_percent_increase_;
 
   HttpTransactionDelegate* transaction_delegate_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_CACHE_TRANSACTION_H_