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 4dda69d677d3fd1a817eebd5e2ddf0966229a6e0..fa74a59082f60913a5fbb74e29699765feb4c471 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -1931,14 +1931,6 @@ 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();