Battery impact UMA

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index 3f65f354c154e4b87a7a033b43048d576a404096..61f32ff580fc780f28336fc8c690233362a84331 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -119,6 +119,7 @@
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
+#include "content/public/browser/power_usage_monitor.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
@@ -1594,6 +1595,11 @@ int ChromeBrowserMainParts::PreMainMessageLoopRunImpl() {
   }
   browser_creator_.reset();
 
+#if !defined(OS_LINUX) || defined(OS_CHROMEOS)  // http://crbug.com/426393
+  if (g_browser_process->metrics_service()->reporting_active())
+    content::StartPowerUsageMonitor();
+#endif
+
   process_power_collector_.reset(new ProcessPowerCollector);
   process_power_collector_->Initialize();
 #endif  // !defined(OS_ANDROID)