Removing WinXP and Vista specific code from Chromoting.

remoting/host/curtain_mode_win.cc

Index: remoting/host/curtain_mode_win.cc
diff --git a/remoting/host/curtain_mode_win.cc b/remoting/host/curtain_mode_win.cc
index 2e5355f987d84f051f9cc5b0d33de6cf8fc775da..0be0bdf5cac645e83c9e8a762bd080ff677f7c80 100644
--- a/remoting/host/curtain_mode_win.cc
+++ b/remoting/host/curtain_mode_win.cc
@@ -8,7 +8,6 @@
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
-#include "base/win/windows_version.h"
 #include "remoting/host/client_session_control.h"
 
 namespace remoting {
@@ -28,11 +27,6 @@ CurtainModeWin::CurtainModeWin() {
 }
 
 bool CurtainModeWin::Activate() {
-  if (base::win::GetVersion() < base::win::VERSION_VISTA) {
-    LOG(ERROR) << "Curtain mode is not supported on Windows XP/2003";
-    return false;
-  }
-
   DWORD session_id;
   if (!ProcessIdToSessionId(GetCurrentProcessId(), &session_id)) {
     PLOG(ERROR) << "Failed to map the current PID to session ID";