Add HANDLE_FLAG_PROTECT_FROM_CLOSE flag to Tracked/ScopedHandle.

chrome/app/close_handle_hook_win.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/app/close_handle_hook_win.h"
 
 #include <Windows.h>
 #include <psapi.h>
 
 #include <vector>
@@ skipping 167 matching lines @@
     delete *it;
   }
 }
 
 bool UseHooks() {
 #if defined(ARCH_CPU_X86_64)
   return false;
 #elif defined(NDEBUG)
   chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
   if (channel == chrome::VersionInfo::CHANNEL_CANARY ||
-      channel == chrome::VersionInfo::CHANNEL_DEV) {
+      channel == chrome::VersionInfo::CHANNEL_DEV ||
+      channel == chrome::VersionInfo::CHANNEL_UNKNOWN) {
     return true;
   }
 
   return false;
 #else  // NDEBUG
   return true;
 #endif
 }
 
 void PatchLoadedModules(CloseHandleHooks* hooks) {
@@ skipping 15 matching lines @@
 }  // namespace
 
 void InstallCloseHandleHooks() {
   if (UseHooks()) {
     CloseHandleHooks* hooks = g_hooks.Pointer();
 
     // Performing EAT interception first is safer in the presence of other
     // threads attempting to call CloseHandle.
     hooks->AddEATPatch();
     PatchLoadedModules(hooks);
-  } else {
-    base::win::DisableHandleVerifier();
   }
 }
 
 void RemoveCloseHandleHooks() {
   // We are partching all loaded modules without forcing them to stay in memory,
   // removing patches is not safe.
 }