Chrome tracing for system-wide performance stats.

content/browser/browser_main_loop.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 "content/browser/browser_main_loop.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/path_service.h"
 #include "base/pending_task.h"
 #include "base/power_monitor/power_monitor.h"
 #include "base/power_monitor/power_monitor_device_source.h"
 #include "base/process/process_metrics.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/system_monitor/system_monitor.h"
+#include "base/thread_task_runner_handle.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/timer/hi_res_timer_manager.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/device_orientation/device_inertial_sensor_service.h"
 #include "content/browser/download/save_file_manager.h"
 #include "content/browser/gamepad/gamepad_service.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/browser/gpu/compositor_util.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
@@ skipping 415 matching lines @@
   if (base::debug::TraceLog::GetInstance()->IsEnabled()) {
     TRACE_EVENT0("startup", "BrowserMainLoop::InitStartupTracing")
     TraceControllerImpl::GetInstance()->InitStartupTracing(
         parsed_command_line_);
   }
 
   {
     TRACE_EVENT0("startup", "BrowserMainLoop::Subsystem:OnlineStateObserver")
     online_state_observer_.reset(new BrowserOnlineStateObserver);
   }
+
+  {
+    system_stats_monitor_.reset(new base::debug::TraceEventSystemStatsMonitor(
+        base::ThreadTaskRunnerHandle::Get()));
+  }
 #endif  // !defined(OS_IOS)
 
 #if defined(OS_WIN)
   system_message_window_.reset(new SystemMessageWindowWin);
 
   if (base::win::IsTSFAwareRequired()) {
     // Create a TSF message filter for the message loop. MessageLoop takes
     // ownership of the filter.
     scoped_ptr<base::win::TextServicesMessageFilter> tsf_message_filter(
       new base::win::TextServicesMessageFilter);
@@ skipping 240 matching lines @@
       base::Bind(base::IgnoreResult(&base::ThreadRestrictions::SetIOAllowed),
                  true));
 
   if (parts_) {
     TRACE_EVENT0("shutdown",
                  "BrowserMainLoop::Subsystem:PostMainMessageLoopRun");
     parts_->PostMainMessageLoopRun();
   }
 
   trace_memory_controller_.reset();
+  system_stats_monitor_.reset();
 
 #if !defined(OS_IOS)
   // Destroying the GpuProcessHostUIShims on the UI thread posts a task to
   // delete related objects on the GPU thread. This must be done before
   // stopping the GPU thread. The GPU thread will close IPC channels to renderer
   // processes so this has to happen before stopping the IO thread.
   {
     TRACE_EVENT0("shutdown", "BrowserMainLoop::Subsystem:GPUProcessHostShim");
     GpuProcessHostUIShim::DestroyAll();
   }
@@ skipping 307 matching lines @@
   if (parameters_.ui_task)
     base::MessageLoopForUI::current()->PostTask(FROM_HERE,
                                                 *parameters_.ui_task);
 
   base::RunLoop run_loop;
   run_loop.Run();
 #endif
 }
 
 }  // namespace content