Adding histograms showing fraction of page load times

net/url_request/url_request_http_job.h

Index: net/url_request/url_request_http_job.h
===================================================================
--- net/url_request/url_request_http_job.h	(revision 147972)
+++ net/url_request/url_request_http_job.h	(working copy)
@@ -91,6 +91,7 @@
   virtual void DoneReading() OVERRIDE;
   virtual HostPortPair GetSocketAddress() const OVERRIDE;
   virtual void NotifyURLRequestDestroyed() OVERRIDE;
+  virtual void OnDetachRequest() OVERRIDE;
 
   HttpRequestInfo request_info_;
   const HttpResponseInfo* response_info_;
@@ -142,6 +143,7 @@
   typedef base::RefCountedData<bool> SharedBoolean;
 
   class HttpFilterContext;
+  class HttpTransactionDelegateImpl;
 
   virtual ~URLRequestHttpJob();
 
@@ -234,6 +236,8 @@
   // to inform the NetworkDelegate that it may not call back.
   bool awaiting_callback_;
 
+  scoped_ptr<HttpTransactionDelegateImpl> http_transaction_delegate_;
+
   DISALLOW_COPY_AND_ASSIGN(URLRequestHttpJob);
 };