Measure loading time of several tabs.

chrome/browser/automation/automation_provider_observers.h

 // Copyright (c) 2009 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.
 
 #ifndef CHROME_BROWSER_AUTOMATION_AUTOMATION_PROVIDER_OBSERVERS_H_
 #define CHROME_BROWSER_AUTOMATION_AUTOMATION_PROVIDER_OBSERVERS_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 18 matching lines @@
 
 class InitialLoadObserver : public NotificationObserver {
  public:
   InitialLoadObserver(size_t tab_count, AutomationProvider* automation);
   ~InitialLoadObserver();
 
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
+  // Caller owns the return value and is responsible for deleting it.
+  // Example return value:
+  // {'tabs': [{'start_time_ms': 1, 'stop_time_ms': 2.5},
+  //           {'start_time_ms': 0.5, 'stop_time_ms': 3}]}
+  // stop_time_ms values may be null if WaitForInitialLoads has not finished.
+  // Only includes entries for the |tab_count| tabs we are monitoring.
+  // There is no defined ordering of the return value.
+  DictionaryValue* GetTimingInformation() const;
+
  private:
+  class TabTime;
+  typedef std::map<uintptr_t, TabTime> TabTimeMap;
   typedef std::set<uintptr_t> TabSet;
 
   void ConditionMet();
 
   NotificationRegistrar registrar_;
 
   AutomationProvider* automation_;
   size_t outstanding_tab_count_;
-  TabSet loading_tabs_;
+  base::TimeTicks init_time_;
+  TabTimeMap loading_tabs_;
   TabSet finished_tabs_;
 
   DISALLOW_COPY_AND_ASSIGN(InitialLoadObserver);
 };
 
 // Watches for NewTabUI page loads for performance timing purposes.
 class NewTabUILoadObserver : public NotificationObserver {
  public:
   explicit NewTabUILoadObserver(AutomationProvider* automation);
   ~NewTabUILoadObserver();
@@ skipping 555 matching lines @@
  private:
   NotificationRegistrar registrar_;
   AutomationProvider* automation_;
   IPC::Message* reply_message_;
   NavigationController* controller_;
 
   DISALLOW_COPY_AND_ASSIGN(OmniboxAcceptNotificationObserver);
 };
 
 #endif  // CHROME_BROWSER_AUTOMATION_AUTOMATION_PROVIDER_OBSERVERS_H_