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 148459)
+++ 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"
@@ -215,7 +216,11 @@
   BrowserContext::EnsureResourceContextInitialized(profile);
 }
 
-ProfileIOData::AppRequestContext::AppRequestContext() {}
+ProfileIOData::AppRequestContext::AppRequestContext(
+    chrome_browser_net::CacheStats* cache_stats)
+    : ChromeURLRequestContext(ChromeURLRequestContext::CONTEXT_TYPE_APP,
+                              cache_stats) {
+}
 
 void ProfileIOData::AppRequestContext::SetCookieStore(
     net::CookieStore* cookie_store) {
@@ -451,10 +456,16 @@
   IOThread* const io_thread = profile_params_->io_thread;
   IOThread::Globals* const io_thread_globals = io_thread->globals();
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  cache_stats_ = GetCacheStats(io_thread_globals);
 
   // Create the common request contexts.
-  main_request_context_.reset(new ChromeURLRequestContext);
-  extensions_request_context_.reset(new ChromeURLRequestContext);
+  main_request_context_.reset(
+      new ChromeURLRequestContext(ChromeURLRequestContext::CONTEXT_TYPE_MAIN,
+                                  cache_stats_));
+  extensions_request_context_.reset(
+      new ChromeURLRequestContext(
+          ChromeURLRequestContext::CONTEXT_TYPE_EXTENSIONS,
+          cache_stats_));
 
   chrome_url_data_manager_backend_.reset(new ChromeURLDataManagerBackend);
 
@@ -464,7 +475,8 @@
         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(