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

content/renderer/renderer_main.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 "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/debug/stack_trace.h"
 #include "base/debug/trace_event.h"
 #include "base/hi_res_timer_manager.h"
 #include "base/i18n/rtl.h"
 #include "base/memory/ref_counted.h"
 #include "base/metrics/field_trial.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/metrics/stats_counters.h"
 #include "base/path_service.h"
+#include "base/pending_task.h"
 #include "base/process_util.h"
 #include "base/string_util.h"
 #include "base/system_monitor/system_monitor.h"
 #include "base/threading/platform_thread.h"
 #include "base/time.h"
 #include "content/common/pepper_plugin_registry.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/browser_plugin/browser_plugin_manager_impl.h"
@@ skipping 34 matching lines @@
 // This is a simplified version of the browser Jankometer, which measures
 // the processing time of tasks on the render thread.
 class RendererMessageLoopObserver : public MessageLoop::TaskObserver {
  public:
   RendererMessageLoopObserver()
       : process_times_(base::Histogram::FactoryGet(
             "Chrome.ProcMsgL RenderThread",
             1, 3600000, 50, base::Histogram::kUmaTargetedHistogramFlag)) {}
   virtual ~RendererMessageLoopObserver() {}
 
-  virtual void WillProcessTask(base::TimeTicks time_posted) {
+  virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
     begin_process_message_ = base::TimeTicks::Now();
   }
 
-  virtual void DidProcessTask(base::TimeTicks time_posted) {
+  virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
     if (!begin_process_message_.is_null())
       process_times_->AddTime(base::TimeTicks::Now() - begin_process_message_);
   }
 
  private:
   base::TimeTicks begin_process_message_;
   base::HistogramBase* const process_times_;
   DISALLOW_COPY_AND_ASSIGN(RendererMessageLoopObserver);
 };
 
 // For measuring memory usage after each task. Behind a command line flag.
 class MemoryObserver : public MessageLoop::TaskObserver {
  public:
   MemoryObserver() {}
   virtual ~MemoryObserver() {}
 
-  virtual void WillProcessTask(base::TimeTicks time_posted) OVERRIDE {}
+  virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
+  }
 
-  virtual void DidProcessTask(base::TimeTicks time_posted) OVERRIDE {
+  virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
     HISTOGRAM_MEMORY_KB("Memory.RendererUsed", webkit_glue::MemoryUsageKB());
   }
  private:
   DISALLOW_COPY_AND_ASSIGN(MemoryObserver);
 };
 
 // mainline routine for running as the Renderer process
 int RendererMain(const MainFunctionParams& parameters) {
   TRACE_EVENT_BEGIN_ETW("RendererMain", 0, "");
 
@@ skipping 117 matching lines @@
       MessageLoop::current()->Run();
       TRACE_EVENT_END_ETW("RendererMain.START_MSG_LOOP", 0, 0);
     }
   }
   platform.PlatformUninitialize();
   TRACE_EVENT_END_ETW("RendererMain", 0, "");
   return 0;
 }
 
 }  // namespace content