Change PrefStore::ReadResult to a boolean.

chrome/test/base/testing_pref_service.cc

Index: chrome/test/base/testing_pref_service.cc
diff --git a/chrome/test/base/testing_pref_service.cc b/chrome/test/base/testing_pref_service.cc
index b066439dcf3d5be4fa61fc073c2fa2afae51427d..4ef4ec8ad8075fa47bc3eccd1809f84edf68c698 100644
--- a/chrome/test/base/testing_pref_service.cc
+++ b/chrome/test/base/testing_pref_service.cc
@@ -85,7 +85,7 @@ void TestingPrefServiceBase::RemoveRecommendedPref(const char* 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,