[ios] Cleaned up UIWebView workarounds from window_id.js.

ios/web/web_state/js/resources/window_id.js

 // 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.
 
 // This file adheres to closure-compiler conventions in order to enable
 // compilation with ADVANCED_OPTIMIZATIONS. See http://goo.gl/FwOgy
 
 // Script to set windowId.
 
 
 // Namespace for module, used as presence beacon for injection checks.
 __gCrWeb['windowIdObject'] = {};
 
 (function() {
-  // CRWJSWindowIdManager replaces $(WINDOW_ID) with appropriate string upon
+  // CRWJSWindowIDManager replaces $(WINDOW_ID) with appropriate string upon
   // injection.
   __gCrWeb['windowId'] = '$(WINDOW_ID)';
 
-  // Wrap queues flushing in setTimeout to avoid reentrant calls.
-  // In some circumstances setTimeout does not work on iOS8 if set from
-  // injected script. There is an assumption that it's happen when the script
-  // has been injected too early. Do not place anything important to delayed
-  // function body, since there is no guarantee that it will ever be executed.
-  // TODO(eugenebut): Find out why setTimeout does not work (crbug.com/402682).
-  window.setTimeout(function() {
-    // Send messages queued since message.js injection.
-    if (__gCrWeb.message) {
-      __gCrWeb.message.invokeQueues();
-    }
-  }, 0);
+  // Send messages queued since message.js injection.
+  __gCrWeb.message.invokeQueues();
 }());