PerformanceMonitor: UMA alert for high browser CPU usage.

chrome/browser/performance_monitor/startup_timer.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/performance_monitor/startup_timer.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 72 matching lines @@
                                     g_startup_timer_->pause_started_;
 
   g_startup_timer_->pause_started_ = base::TimeTicks();
 }
 
 void StartupTimer::Observe(int type,
                            const content::NotificationSource& source,
                            const content::NotificationDetails& details) {
   CHECK(type == chrome::NOTIFICATION_PERFORMANCE_MONITOR_INITIALIZED);
   performance_monitor_initialized_ = true;
-  if (elapsed_startup_time_ != base::TimeDelta())
-    InsertElapsedStartupTime();
-  if (elapsed_session_restore_times_.size())
-    InsertElapsedSessionRestoreTime();
+
+  if (PerformanceMonitor::GetInstance()->database_logging_enabled()) {
+    if (elapsed_startup_time_ != base::TimeDelta())
+      InsertElapsedStartupTime();
+    if (elapsed_session_restore_times_.size())
+      InsertElapsedSessionRestoreTime();
+  }
 }
 
 // static
 void StartupTimer::SetElapsedSessionRestoreTime(
     const base::TimeDelta& elapsed_session_restore_time) {
   g_startup_timer_->elapsed_session_restore_times_.push_back(
       elapsed_session_restore_time);
 
   if (g_startup_timer_->performance_monitor_initialized_)
     g_startup_timer_->InsertElapsedSessionRestoreTime();
@@ skipping 23 matching lines @@
         base::Bind(
             &AddMetricToDatabaseOnBackgroundThread,
             base::Unretained(PerformanceMonitor::GetInstance()->database()),
             Metric(METRIC_SESSION_RESTORE_TIME,
                    base::Time::Now(),
                    static_cast<double>(iter->ToInternalValue()))));
   }
 }
 
 }  // namespace performance_monitor