Adding histograms showing fraction of page load times

net/http/http_transaction_factory.h

Index: net/http/http_transaction_factory.h
===================================================================
--- net/http/http_transaction_factory.h	(revision 147972)
+++ net/http/http_transaction_factory.h	(working copy)
@@ -13,8 +13,8 @@
 class HttpCache;
 class HttpNetworkSession;
 class HttpTransaction;
+class HttpTransactionDelegate;
 
-
 // An interface to a class that can create HttpTransaction objects.
 class NET_EXPORT HttpTransactionFactory {
  public:
@@ -22,7 +22,8 @@
 
   // Creates a HttpTransaction object. On success, saves the new
   // transaction to |*trans| and returns OK.
-  virtual int CreateTransaction(scoped_ptr<HttpTransaction>* trans) = 0;
+  virtual int CreateTransaction(scoped_ptr<HttpTransaction>* trans,
+                                HttpTransactionDelegate* delegate) = 0;
 
   // Returns the associated cache if any (may be NULL).
   virtual HttpCache* GetCache() = 0;