Remove PowerUsageMonitor.

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 dd7aa64552f037cbd86a55a92219d26abf112daf..b116cc5b2dd6f1d200d3ffc894be0c77d332cdd4 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -1930,14 +1930,6 @@ int ChromeBrowserMainParts::PreMainMessageLoopRunImpl() {
   }
   run_message_loop_ = started;
   browser_creator_.reset();
-
-#if !defined(OS_LINUX) || defined(OS_CHROMEOS)
-  // Collects power-related UMA stats for Windows, Mac, and ChromeOS.
-  // Linux is not supported (crbug.com/426393).
-  power_usage_monitor_.reset(new PowerUsageMonitor());
-  power_usage_monitor_->Start();
-#endif  // !defined(OS_LINUX) || defined(OS_CHROMEOS)
-
 #endif  // !defined(OS_ANDROID)
 
   PostBrowserStart();