Adding histograms showing fraction of page load times

net/http/http_cache.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 a HttpTransactionFactory implementation that can be
 // layered on top of another HttpTransactionFactory to add HTTP caching.  The
 // caching logic follows RFC 2616 (any exceptions are called out in the code).
 //
 // The HttpCache takes a disk_cache::Backend as a parameter, and uses that for
 // the cache storage.
@@ skipping 173 matching lines @@
   void CloseAllConnections();
 
   // Close all idle connections. Will close all sockets not in active use.
   void CloseIdleConnections();
 
   // Called whenever an external cache in the system reuses the resource
   // referred to by |url| and |http_method|.
   void OnExternalCacheHit(const GURL& url, const std::string& http_method);
 
   // HttpTransactionFactory implementation:
-  virtual int CreateTransaction(scoped_ptr<HttpTransaction>* trans) OVERRIDE;
+  virtual int CreateTransaction(scoped_ptr<HttpTransaction>* trans,
+                                HttpTransactionDelegate* delegate) OVERRIDE;
   virtual HttpCache* GetCache() OVERRIDE;
   virtual HttpNetworkSession* GetSession() OVERRIDE;
 
  protected:
   // Disk cache entry data indices.
   enum {
     kResponseInfoIndex = 0,
     kResponseContentIndex,
     kMetadataIndex,
 
@@ skipping 186 matching lines @@
   PendingOpsMap pending_ops_;
 
   scoped_ptr<PlaybackCacheMap> playback_cache_map_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpCache);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_CACHE_H_