Don't post tasks from RulesRegistry c-tor

chrome/browser/extensions/api/declarative/rules_registry.cc

 // Copyright (c) 2012 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/browser/extensions/api/declarative/rules_registry.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 70 matching lines @@
     const WebViewKey& webview_key)
     : profile_(profile),
       owner_thread_(owner_thread),
       event_name_(event_name),
       webview_key_(webview_key),
       weak_ptr_factory_(profile ? this : NULL),
       last_generated_rule_identifier_id_(0) {
   if (cache_delegate) {
     cache_delegate_ = cache_delegate->GetWeakPtr();
     cache_delegate->Init(this);
-  } else {
-    content::BrowserThread::PostTask(
-        owner_thread,
-        FROM_HERE,
-        base::Bind(&RulesRegistry::MarkReady, this, base::Time::Now()));
   }
+  // Note that if |cache_delegate| is NULL, the Rulesregistry never signals its
+  // |ready_| event. That's OK, because that event is only ever needed by the
+  // cache delegate.
 }
 
 std::string RulesRegistry::AddRulesNoFill(
     const std::string& extension_id,
     const std::vector<linked_ptr<Rule> >& rules) {
   DCHECK(content::BrowserThread::CurrentlyOn(owner_thread()));
 
   // Verify that all rule IDs are new.
   for (std::vector<linked_ptr<Rule> >::const_iterator i =
       rules.begin(); i != rules.end(); ++i) {
@@ skipping 263 matching lines @@
   for (i = identifiers.begin(); i != identifiers.end(); ++i)
     used_rule_identifiers_[extension_id].erase(*i);
 }
 
 void RulesRegistry::RemoveAllUsedRuleIdentifiers(
     const std::string& extension_id) {
   used_rule_identifiers_.erase(extension_id);
 }
 
 }  // namespace extensions