MessageLoop's RUN method will pass a const ref to PendingTask when

chrome/browser/jankometer.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/jankometer.h"
 
 #include <limits>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/stats_counters.h"
+#include "base/pending_task.h"
 #include "base/string_util.h"
 #include "base/threading/thread.h"
 #include "base/threading/watchdog.h"
 #include "base/time.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/public/browser/browser_thread.h"
 
 using base::TimeDelta;
@@ skipping 208 matching lines @@
   virtual void WillProcessIOEvent() OVERRIDE {
     if (!helper_.MessageWillBeMeasured())
       return;
     helper_.StartProcessingTimers(base::TimeDelta());
   }
 
   virtual void DidProcessIOEvent() OVERRIDE {
     helper_.EndProcessingTimers();
   }
 
-  virtual void WillProcessTask(base::TimeTicks time_posted) OVERRIDE {
+  virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
     if (!helper_.MessageWillBeMeasured())
       return;
     base::TimeTicks now = base::TimeTicks::Now();
-    const base::TimeDelta queueing_time = now - time_posted;
+    const base::TimeDelta queueing_time = now - pending_task.time_posted;
     helper_.StartProcessingTimers(queueing_time);
   }
 
-  virtual void DidProcessTask(base::TimeTicks time_posted) OVERRIDE {
+  virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
     helper_.EndProcessingTimers();
   }
 
  private:
   friend class base::RefCountedThreadSafe<IOJankObserver>;
 
   ~IOJankObserver() {}
 
   JankObserverHelper helper_;
 
@@ skipping 19 matching lines @@
     MessageLoop::current()->AddTaskObserver(this);
   }
 
   // Detaches the observer to the current thread's message loop.
   void DetachFromCurrentThread() {
     DCHECK_EQ(MessageLoop::current()->type(), MessageLoop::TYPE_UI);
     MessageLoop::current()->RemoveTaskObserver(this);
     MessageLoopForUI::current()->RemoveObserver(this);
   }
 
-  virtual void WillProcessTask(base::TimeTicks time_posted) OVERRIDE {
+  virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
     if (!helper_.MessageWillBeMeasured())
       return;
     base::TimeTicks now = base::TimeTicks::Now();
-    const base::TimeDelta queueing_time = now - time_posted;
+    const base::TimeDelta queueing_time = now - pending_task.time_posted;
     helper_.StartProcessingTimers(queueing_time);
   }
 
-  virtual void DidProcessTask(base::TimeTicks time_posted) OVERRIDE {
+  virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
     helper_.EndProcessingTimers();
   }
 
 #if defined(OS_WIN)
   virtual base::EventStatus WillProcessEvent(
       const base::NativeEvent& event) OVERRIDE {
     if (!helper_.MessageWillBeMeasured())
       return base::EVENT_CONTINUE;
     // GetMessageTime returns a LONG (signed 32-bit) and GetTickCount returns
     // a DWORD (unsigned 32-bit). They both wrap around when the time is longer
@@ skipping 104 matching lines @@
     delete ui_observer;
     ui_observer = NULL;
   }
   if (io_observer) {
     // IO thread can't be running when we remove observers.
     DCHECK((!g_browser_process) || !(g_browser_process->io_thread()));
     delete io_observer;
     io_observer = NULL;
   }
 }