Allow declarative webrequest and webrequest in extensions.

extensions/browser/api/declarative/rules_registry_service.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 "extensions/browser/api/declarative/rules_registry_service.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 77 matching lines @@
           browser_context_, webview_key, web_request_rules_registry));
 
   // Only create a ContentRulesRegistry for regular pages and not webviews.
   if (!IsWebView(webview_key)) {
     RulesCacheDelegate* content_rules_cache_delegate =
         new RulesCacheDelegate(false /*log_storage_init_delay*/);
     cache_delegates_.push_back(content_rules_cache_delegate);
     scoped_refptr<ContentRulesRegistry> content_rules_registry =
         ExtensionsAPIClient::Get()->CreateContentRulesRegistry(
             browser_context_, content_rules_cache_delegate);
-    RegisterRulesRegistry(content_rules_registry);
-    content_rules_registry_ = content_rules_registry.get();
+    if (content_rules_registry.get() != nullptr) {
+      RegisterRulesRegistry(content_rules_registry);
+      content_rules_registry_ = content_rules_registry.get();
+    }
   }
 }
 
 void RulesRegistryService::Shutdown() {
   // Release the references to all registries. This would happen soon during
   // destruction of |*this|, but we need the ExtensionWebRequestEventRouter to
   // be the last to reference the WebRequestRulesRegistry objects, so that
   // the posted task below causes their destruction on the IO thread, not on UI
   // where the destruction of |*this| takes place.
   // TODO(vabr): Remove once http://crbug.com/218451#c6 gets addressed.
@@ skipping 115 matching lines @@
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   DCHECK_EQ(content::NOTIFICATION_RENDERER_PROCESS_TERMINATED, type);
 
   content::RenderProcessHost* process =
       content::Source<content::RenderProcessHost>(source).ptr();
   RemoveWebViewRulesRegistries(process->GetID());
 }
 
 }  // namespace extensions