Revert "Disable the scoped handle verifier (and close hook) for M-39"

This reverts commit 20d99284. {#297319}

BUG=418816
R=cpu@chromium.org
TBR=cpu@chromium.org

Review URL: https://codereview.chromium.org/616533004

Cr-Commit-Position: refs/heads/master@{#297342}

chrome/app/close_handle_hook_win.cc

@@ -66,6 +66,12 @@ void CloseHandleHooks::Unpatch() {
 }
 
 bool UseHooks() {
+  chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
+  if (channel == chrome::VersionInfo::CHANNEL_CANARY ||
+      channel == chrome::VersionInfo::CHANNEL_DEV) {
+    return true;
+  }
+
   return false;
 }