Adding histograms showing fraction of page load times

net/url_request/url_request_http_job.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.
 
 #ifndef NET_URL_REQUEST_URL_REQUEST_HTTP_JOB_H_
 #define NET_URL_REQUEST_URL_REQUEST_HTTP_JOB_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 124 matching lines @@
 
  private:
   enum CompletionCause {
     ABORTED,
     FINISHED
   };
 
   typedef base::RefCountedData<bool> SharedBoolean;
 
   class HttpFilterContext;
+  class HttpTransactionDelegateImpl;
 
   virtual ~URLRequestHttpJob();
 
   void RecordTimer();
   void ResetTimer();
 
   virtual void UpdatePacketReadTimes() OVERRIDE;
   void RecordPacketStats(FilterContext::StatisticSelector statistic) const;
 
   void RecordCompressionHistograms();
@@ skipping 25 matching lines @@
   // the uncompressed size. If this is the case, we return true in order
   // to request to work around this non-adherence to the HTTP standard.
   // |rv| is the standard return value of a read function indicating the number
   // of bytes read or, if negative, an error code.
   bool ShouldFixMismatchedContentLength(int rv) const;
 
   // Returns the effective response headers, considering that they may be
   // overridden by |override_response_headers_|.
   HttpResponseHeaders* GetResponseHeaders() const;
 
+  // Override of the private interface of URLRequestJob.
+  virtual void OnDetachRequest() OVERRIDE;
+
   base::Time request_creation_time_;
 
   // Data used for statistics gathering. This data is only used for histograms
   // and is not required. It is only gathered if packet_timing_enabled_ == true.
   //
   // TODO(jar): improve the quality of the gathered info by gathering most times
   // at a lower point in the network stack, assuring we have actual packet
   // boundaries, rather than approximations.  Also note that input byte count
   // as gathered here is post-SSL, and post-cache-fetch, and does not reflect
   // true packet arrival times in such cases.
@@ skipping 27 matching lines @@
   // layers of the network stack.
   scoped_refptr<HttpResponseHeaders> override_response_headers_;
 
   // Flag used to verify that |this| is not deleted while we are awaiting
   // a callback from the NetworkDelegate. Used as a fail-fast mechanism.
   // True if we are waiting a callback and
   // NetworkDelegate::NotifyURLRequestDestroyed has not been called, yet,
   // to inform the NetworkDelegate that it may not call back.
   bool awaiting_callback_;
 
+  scoped_ptr<HttpTransactionDelegateImpl> http_transaction_delegate_;
+
   DISALLOW_COPY_AND_ASSIGN(URLRequestHttpJob);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_HTTP_JOB_H_