Adding histograms showing fraction of page load times

net/http/http_transaction_unittest.cc

Index: net/http/http_transaction_unittest.cc
===================================================================
--- net/http/http_transaction_unittest.cc	(revision 147972)
+++ net/http/http_transaction_unittest.cc	(working copy)
@@ -151,7 +151,7 @@
       trans_(NULL),
       error_(net::OK) {
   // Disregard the error code.
-  factory->CreateTransaction(&trans_);
+  factory->CreateTransaction(&trans_, NULL);
   ++quit_counter_;
 }
 
@@ -341,7 +341,8 @@
 }
 
 int MockNetworkLayer::CreateTransaction(
-    scoped_ptr<net::HttpTransaction>* trans) {
+    scoped_ptr<net::HttpTransaction>* trans,
+    net::HttpTransactionDelegate* delegate) {
   transaction_count_++;
   trans->reset(new MockNetworkTransaction(this));
   return net::OK;