Move power event handling logic from ui/ to base/ on Windows

ui/views/win/hwnd_message_handler.cc

Index: ui/views/win/hwnd_message_handler.cc
diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
index d1c85344b28f93e26944345a90ee715142da34c8..8c7fdbb57341ba2cfc10cb926450a4189f4599f6 100644
--- a/ui/views/win/hwnd_message_handler.cc
+++ b/ui/views/win/hwnd_message_handler.cc
@@ -9,7 +9,6 @@
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
-#include "base/system_monitor/system_monitor.h"
 #include "base/win/windows_version.h"
 #include "ui/base/events/event.h"
 #include "ui/base/events/event_utils.h"
@@ -1888,14 +1887,6 @@ void HWNDMessageHandler::OnPaint(HDC dc) {
   }
 }
 
-LRESULT HWNDMessageHandler::OnPowerBroadcast(DWORD power_event, DWORD data) {
-  base::SystemMonitor* monitor = base::SystemMonitor::Get();
-  if (monitor)
-    monitor->ProcessWmPowerBroadcastMessage(power_event);
-  SetMsgHandled(FALSE);
-  return 0;
-}
-
 LRESULT HWNDMessageHandler::OnReflectedMessage(UINT message,
                                                WPARAM w_param,
                                                LPARAM l_param) {