Change PrefStore::ReadResult to a boolean.

chrome/test/base/testing_pref_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 "chrome/test/base/testing_pref_service.h"
 
 #include "base/prefs/default_pref_store.h"
 #include "base/prefs/testing_pref_store.h"
 #include "chrome/browser/policy/configuration_policy_pref_store.h"
 #include "chrome/browser/prefs/browser_prefs.h"
@@ skipping 67 matching lines @@
   SetPref(recommended_prefs_, path, value);
 }
 
 void TestingPrefServiceBase::RemoveRecommendedPref(const char* path) {
   RemovePref(recommended_prefs_, path);
 }
 
 const Value* TestingPrefServiceBase::GetPref(TestingPrefStore* pref_store,
                                              const char* path) const {
   const Value* res;
-  return pref_store->GetValue(path, &res) == PrefStore::READ_OK ? res : NULL;
+  return pref_store->GetValue(path, &res) ? res : NULL;
 }
 
 void TestingPrefServiceBase::SetPref(TestingPrefStore* pref_store,
                                      const char* path,
                                      Value* value) {
   pref_store->SetValue(path, value);
 }
 
 void TestingPrefServiceBase::RemovePref(TestingPrefStore* pref_store,
                                         const char* path) {
@@ skipping 17 matching lines @@
     : browser_process_(browser_process) {
   chrome::RegisterLocalState(&local_state_);
   EXPECT_FALSE(browser_process->local_state());
   browser_process->SetLocalState(&local_state_);
 }
 
 ScopedTestingLocalState::~ScopedTestingLocalState() {
   EXPECT_EQ(&local_state_, browser_process_->local_state());
   browser_process_->SetLocalState(NULL);
 }