Adding histograms showing fraction of page load times

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
===================================================================
--- chrome/browser/profiles/profile_io_data.cc	(revision 147972)
+++ chrome/browser/profiles/profile_io_data.cc	(working copy)
@@ -28,6 +28,7 @@
 #include "chrome/browser/extensions/extension_resource_protocols.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/io_thread.h"
+#include "chrome/browser/net/cache_stats.h"
 #include "chrome/browser/net/chrome_cookie_notification_details.h"
 #include "chrome/browser/net/chrome_fraudulent_certificate_reporter.h"
 #include "chrome/browser/net/chrome_net_log.h"
@@ -263,6 +264,9 @@
     it->second->AssertNoURLRequests();
     delete it->second;
   }
+  chrome_browser_net::CacheStats* cache_stats = GetCacheStats();
+  if (cache_stats)
+    cache_stats->UnregisterMainURLRequestContext(main_request_context_.get());
 }
 
 // static
@@ -456,13 +460,18 @@
 
   chrome_url_data_manager_backend_.reset(new ChromeURLDataManagerBackend);
 
+  chrome_browser_net::CacheStats* cache_stats = GetCacheStats();
+  if (cache_stats)
+    cache_stats->RegisterMainURLRequestContext(main_request_context_.get());
+
   network_delegate_.reset(new ChromeNetworkDelegate(
         io_thread_globals->extension_event_router_forwarder.get(),
         profile_params_->extension_info_map,
         url_blacklist_manager_.get(),
         profile_params_->profile,
         profile_params_->cookie_settings,
-        &enable_referrers_));
+        &enable_referrers_,
+        cache_stats));
 
   fraudulent_certificate_reporter_.reset(
       new chrome_browser_net::ChromeFraudulentCertificateReporter(
@@ -583,3 +592,8 @@
 void ProfileIOData::DestroyResourceContext() {
   resource_context_.reset();
 }
+
+chrome_browser_net::CacheStats* ProfileIOData::GetCacheStats() const {

[rvargas (doing something else), 2012/07/26 02:13:43]

ditto

[tburkard, 2012/07/26 02:50:54]

Done.

+  DCHECK(profile_params_.get());

[rvargas (doing something else), 2012/07/26 02:13:43]

We usually don't dcheck things that will crash the next line.

[tburkard, 2012/07/26 02:50:54]

Done.

+  return profile_params_->io_thread->globals()->cache_stats.get();
+}