Domain Reliability: Don't create Service if metrics reporting disabled

chrome/browser/domain_reliability/service_factory.h

 // 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.
 
 #ifndef CHROME_BROWSER_DOMAIN_RELIABILITY_SERVICE_FACTORY_H_
 #define CHROME_BROWSER_DOMAIN_RELIABILITY_SERVICE_FACTORY_H_
 
 #include "base/memory/singleton.h"
+#include "base/prefs/pref_member.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
 
 namespace content {
 class BrowserContext;
 }  // namespace content
 
 namespace domain_reliability {
 
 class DomainReliabilityService;
 
@@ skipping 10 matching lines @@
  private:
   friend struct DefaultSingletonTraits<DomainReliabilityServiceFactory>;
 
   DomainReliabilityServiceFactory();
   virtual ~DomainReliabilityServiceFactory();
 
   // BrowserContextKeyedServiceFactory implementation:
   virtual KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* context) const OVERRIDE;
 
+  BooleanPrefMember reporting_pref_;
+
   DISALLOW_COPY_AND_ASSIGN(DomainReliabilityServiceFactory);
 };
 
 }  // namespace domain_reliability
 
 #endif  // CHROME_BROWSER_DOMAIN_RELIABILITY_SERVICE_FACTORY_H_