Adding histograms showing fraction of page load times

chrome/browser/profiles/off_the_record_profile_io_data.cc

Index: chrome/browser/profiles/off_the_record_profile_io_data.cc
===================================================================
--- chrome/browser/profiles/off_the_record_profile_io_data.cc	(revision 148459)
+++ chrome/browser/profiles/off_the_record_profile_io_data.cc	(working copy)
@@ -272,7 +272,7 @@
 OffTheRecordProfileIOData::InitializeAppRequestContext(
     ChromeURLRequestContext* main_context,
     const std::string& app_id) const {
-  AppRequestContext* context = new AppRequestContext;
+  AppRequestContext* context = new AppRequestContext(cache_stats());
 
   // Copy most state from the main context.
   context->CopyFrom(main_context);
@@ -320,3 +320,7 @@
           network_delegate(), ftp_factory_.get(), ftp_auth_cache));
 }
 
+chrome_browser_net::CacheStats* OffTheRecordProfileIOData::GetCacheStats(
+    IOThread* io_thread) const {
+  return NULL;
+}