Add/change metrics for cookie store loading:

net/base/cookie_monster.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Brought to you by the letter D and the number 2.
 
 #ifndef NET_BASE_COOKIE_MONSTER_H_
 #define NET_BASE_COOKIE_MONSTER_H_
 #pragma once
 
@@ skipping 444 matching lines @@
       initialized_ = true;
     }
   }
 
   // Initializes the backing store and reads existing cookies from it.
   // Should only be called by InitIfNecessary().
   void InitStore();
 
   // Stores cookies loaded from the backing store and invokes any deferred
   // calls. |beginning_time| should be the moment PersistentCookieStore::Load
-  // was invoked and is used for reporting histogram_time_load_.
+  // was invoked and is used for reporting histogram_time_blocked_on_load_.
   // See PersistentCookieStore::Load for details on the contents of cookies.
   void OnLoaded(base::TimeTicks beginning_time,
                 const std::vector<CanonicalCookie*>& cookies);
 
   // Stores cookies loaded from the backing store and invokes the deferred
   // task(s) pending loading of cookies associated with the domain key
   // (eTLD+1). Called when all cookies for the domain key(eTLD+1) have been
   // loaded from DB. See PersistentCookieStore::Load for details on the contents
   // of cookies.
   void OnKeyLoaded(
@@ skipping 130 matching lines @@
   base::Histogram* histogram_between_access_interval_minutes_;
   base::Histogram* histogram_evicted_last_access_minutes_;
   base::Histogram* histogram_count_;
   base::Histogram* histogram_domain_count_;
   base::Histogram* histogram_etldp1_count_;
   base::Histogram* histogram_domain_per_etldp1_count_;
   base::Histogram* histogram_number_duplicate_db_cookies_;
   base::Histogram* histogram_cookie_deletion_cause_;
   base::Histogram* histogram_time_get_;
   base::Histogram* histogram_time_mac_;
-  base::Histogram* histogram_time_load_;
+  base::Histogram* histogram_time_blocked_on_load_;
 
   CookieMap cookies_;
 
   // Indicates whether the cookie store has been initialized. This happens
   // lazily in InitStoreIfNecessary().
   bool initialized_;
 
   // Indicates whether loading from the backend store is completed and
   // calls may be immediately processed.
   bool loaded_;
@@ skipping 367 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(PersistentCookieStore);
 };
 
 class CookieList : public std::vector<CookieMonster::CanonicalCookie> {
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_COOKIE_MONSTER_H_