Add HANDLE_FLAG_PROTECT_FROM_CLOSE flag to Tracked/ScopedHandle.

chrome/app/close_handle_hook_win.cc

Index: chrome/app/close_handle_hook_win.cc
diff --git a/chrome/app/close_handle_hook_win.cc b/chrome/app/close_handle_hook_win.cc
index 85cfce5a33149a34d39531902596b9347f42bcc6..4cdaf26cc65d960e30ad19200c22f4a4e78c8b14 100644
--- a/chrome/app/close_handle_hook_win.cc
+++ b/chrome/app/close_handle_hook_win.cc
@@ -185,7 +185,8 @@ bool UseHooks() {
 #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;
   }
 
@@ -221,8 +222,6 @@ void InstallCloseHandleHooks() {
     // threads attempting to call CloseHandle.
     hooks->AddEATPatch();
     PatchLoadedModules(hooks);
-  } else {
-    base::win::DisableHandleVerifier();
   }
 }