Use SafeWrapCurrent to make sure JingleThreadWrapper ctor does not fail.

BUG=413853

Review URL: https://codereview.chromium.org/585133002

Cr-Commit-Position: refs/heads/master@{#295997}

jingle/glue/thread_wrapper.cc

@@ -57,7 +57,7 @@ JingleThreadWrapper::JingleThreadWrapper(
   DCHECK(!rtc::Thread::Current());
   weak_ptr_ = weak_ptr_factory_.GetWeakPtr();
   rtc::MessageQueueManager::Add(this);
-  CHECK(WrapCurrent());
+  SafeWrapCurrent();
 }
 
 JingleThreadWrapper::~JingleThreadWrapper() {