Implement support for disabling sync through configuration management.

chrome/browser/configuration_policy_store.h

 // Copyright (c) 2010 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_CONFIGURATION_POLICY_STORE_H_
 #define CHROME_BROWSER_CONFIGURATION_POLICY_STORE_H_
 
 #include "base/values.h"
 
 // An abstract super class for policy stores that provides a method that can be
 // called by a |ConfigurationPolicyProvider| to specify a policy.
 class ConfigurationPolicyStore {
  public:
   ConfigurationPolicyStore() {}
   virtual ~ConfigurationPolicyStore() {}
 
   enum PolicyType {
     kPolicyHomePage,
     kPolicyHomepageIsNewTabPage,
     kPolicyProxyServerMode,
     kPolicyProxyServer,
     kPolicyProxyPacUrl,
     kPolicyProxyBypassList,
     kPolicyAlternateErrorPagesEnabled,
     kPolicySearchSuggestEnabled,
     kPolicyDnsPrefetchingEnabled,
     kPolicySafeBrowsingEnabled,
     kPolicyMetricsReportingEnabled,
+    kPolicySyncDisabled
   };
 
   static const int kPolicyNoProxyServerMode = 0;
   static const int kPolicyAutoDetectProxyMode = 1;
   static const int kPolicyManuallyConfiguredProxyMode = 2;
   static const int kPolicyUseSystemProxyMode = 3;
 
   // A |ConfigurationPolicyProvider| specifes the value of a policy setting
   // through a call to |Apply|.
   // The configuration policy pref store takes over the ownership of |value|.
   virtual void Apply(PolicyType policy, Value* value) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyStore);
 };
 
 #endif  // CHROME_BROWSER_CONFIGURATION_POLICY_STORE_H_
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