sandbox/win: Fix warnings found by clang chromium-style plugin on Windows.

sandbox/win/src/restricted_token.cc

Index: sandbox/win/src/restricted_token.cc
diff --git a/sandbox/win/src/restricted_token.cc b/sandbox/win/src/restricted_token.cc
index 3960926f4d792829fe3b7fe260335fdc62b549eb..7ebef3de9aefd278df5a012c95c9cc220e3983dd 100644
--- a/sandbox/win/src/restricted_token.cc
+++ b/sandbox/win/src/restricted_token.cc
@@ -10,9 +10,19 @@
 #include "sandbox/win/src/acl.h"
 #include "sandbox/win/src/win_utils.h"
 
-
 namespace sandbox {
 
+RestrictedToken::RestrictedToken()
+    : init_(false),
+      effective_token_(NULL),
+      integrity_level_(INTEGRITY_LEVEL_LAST) {
+}
+
+RestrictedToken::~RestrictedToken() {
+  if (effective_token_)
+    CloseHandle(effective_token_);
+}
+
 unsigned RestrictedToken::Init(const HANDLE effective_token) {
   if (init_)
     return ERROR_ALREADY_INITIALIZED;