Change PrefStore::ReadResult to a boolean.

chrome/browser/policy/managed_mode_policy_provider.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/policy/managed_mode_policy_provider.h"
 
 #include "base/prefs/json_pref_store.h"
 #include "chrome/browser/policy/policy_bundle.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_constants.h"
@@ skipping 59 matching lines @@
 void ManagedModePolicyProvider::OnPrefValueChanged(const std::string& key) {}
 
 void ManagedModePolicyProvider::OnInitializationCompleted(bool success) {
   DCHECK(success);
   UpdatePolicyFromCache();
 }
 
 base::DictionaryValue* ManagedModePolicyProvider::GetCachedPolicy() const {
   base::Value* value = NULL;
   base::DictionaryValue* dict = NULL;
-  PrefStore::ReadResult result = store_->GetMutableValue(kPolicies, &value);
-  switch (result) {
-    case PrefStore::READ_NO_VALUE: {
-      dict = new base::DictionaryValue;
-      store_->SetValue(kPolicies, dict);
-      break;
-    }
-    case PrefStore::READ_OK: {
-      bool success = value->GetAsDictionary(&dict);
-      DCHECK(success);
-      break;
-    }
-    default:
-      NOTREACHED();
+  if (store_->GetMutableValue(kPolicies, &value)) {
+    bool success = value->GetAsDictionary(&dict);
+    DCHECK(success);
+  } else {
+    dict = new base::DictionaryValue;
+    store_->SetValue(kPolicies, dict);
   }
 
   return dict;
 }
 
 void ManagedModePolicyProvider::UpdatePolicyFromCache() {
   scoped_ptr<PolicyBundle> policy_bundle(new PolicyBundle);
   PolicyMap* policy_map =
       &policy_bundle->Get(POLICY_DOMAIN_CHROME, std::string());
   policy_map->LoadFrom(GetCachedPolicy(),
                        POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER);
   UpdatePolicy(policy_bundle.Pass());
 }
 
 }  // namespace policy