PerformanceMonitor: UMA alert for high browser CPU usage.

chrome/browser/chrome_browser_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 "chrome/browser/chrome_browser_main.h"
 
 #if defined(TOOLKIT_GTK)
 #include <gtk/gtk.h>
 #endif
 
@@ skipping 1598 matching lines @@
       performance_monitor::StartupTimer::STARTUP_NORMAL);
 
   DCHECK_EQ(base::MessageLoop::TYPE_UI, base::MessageLoop::current()->type());
 #if !defined(USE_AURA) && defined(TOOLKIT_VIEWS)
   views::AcceleratorHandler accelerator_handler;
   base::RunLoop run_loop(&accelerator_handler);
 #else
   base::RunLoop run_loop;
 #endif
 
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kPerformanceMonitorGathering)) {
-    performance_monitor::PerformanceMonitor::GetInstance()->Start();
-  }
+  performance_monitor::PerformanceMonitor::GetInstance()->Start();
 
   run_loop.Run();
 
   return true;
 #endif
 }
 
 void ChromeBrowserMainParts::PostMainMessageLoopRun() {
   TRACE_EVENT0("startup", "ChromeBrowserMainParts::PostMainMessageLoopRun");
 #if defined(OS_ANDROID)
@@ skipping 56 matching lines @@
   chromeos::CrosSettings::Shutdown();
 #endif
 #endif
 }
 
 // Public members:
 
 void ChromeBrowserMainParts::AddParts(ChromeBrowserMainExtraParts* parts) {
   chrome_extra_parts_.push_back(parts);
 }