Adding histograms showing fraction of page load times

chrome/browser/net/chrome_url_request_context.cc

Index: chrome/browser/net/chrome_url_request_context.cc
===================================================================
--- chrome/browser/net/chrome_url_request_context.cc	(revision 148459)
+++ chrome/browser/net/chrome_url_request_context.cc	(working copy)
@@ -10,6 +10,7 @@
 #include "base/message_loop_proxy.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/io_thread.h"
+#include "chrome/browser/net/cache_stats.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_io_data.h"
@@ -290,14 +291,21 @@
 // ChromeURLRequestContext
 // ----------------------------------------------------------------------------
 
-ChromeURLRequestContext::ChromeURLRequestContext()
+ChromeURLRequestContext::ChromeURLRequestContext(
+    ContextType type,
+    chrome_browser_net::CacheStats* cache_stats)
     : ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)),
-      is_incognito_(false) {
+      is_incognito_(false),
+      cache_stats_(cache_stats) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  if (cache_stats_)
+    cache_stats_->RegisterURLRequestContext(this, type);
 }
 
 ChromeURLRequestContext::~ChromeURLRequestContext() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  if (cache_stats_)
+    cache_stats_->UnregisterURLRequestContext(this);
 }
 
 void ChromeURLRequestContext::CopyFrom(ChromeURLRequestContext* other) {