Adding histograms showing fraction of page load times

chrome/browser/net/chrome_network_delegate.cc

Index: chrome/browser/net/chrome_network_delegate.cc
===================================================================
--- chrome/browser/net/chrome_network_delegate.cc	(revision 148459)
+++ chrome/browser/net/chrome_network_delegate.cc	(working copy)
@@ -14,6 +14,7 @@
 #include "chrome/browser/extensions/event_router_forwarder.h"
 #include "chrome/browser/extensions/extension_info_map.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
+#include "chrome/browser/net/cache_stats.h"
 #include "chrome/browser/prefs/pref_member.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/task_manager/task_manager.h"
@@ -126,14 +127,16 @@
     const policy::URLBlacklistManager* url_blacklist_manager,
     void* profile,
     CookieSettings* cookie_settings,
-    BooleanPrefMember* enable_referrers)
+    BooleanPrefMember* enable_referrers,
+    chrome_browser_net::CacheStats* cache_stats)
     : event_router_(event_router),
       profile_(profile),
       cookie_settings_(cookie_settings),
       extension_info_map_(extension_info_map),
       enable_referrers_(enable_referrers),
       never_throttle_requests_(false),
-      url_blacklist_manager_(url_blacklist_manager) {
+      url_blacklist_manager_(url_blacklist_manager),
+      cache_stats_(cache_stats) {
   DCHECK(event_router);
   DCHECK(enable_referrers);
   DCHECK(!profile || cookie_settings);
@@ -389,3 +392,10 @@
 #endif
   return net::OK;
 }
+
+void ChromeNetworkDelegate::OnCacheWaitStateChange(
+    const net::URLRequest& request,
+    CacheWaitState state) {
+  if (cache_stats_)
+    cache_stats_->OnCacheWaitStateChange(request, state);
+}