Change PrefStore::ReadResult to a boolean.

chrome/service/service_process_prefs.cc

Index: chrome/service/service_process_prefs.cc
diff --git a/chrome/service/service_process_prefs.cc b/chrome/service/service_process_prefs.cc
index 811647dc525c32238714d7fe46c9e28a35fa1e23..c576a3eb2b38d161d5a89f2b1f7e8771a7d5cda1 100644
--- a/chrome/service/service_process_prefs.cc
+++ b/chrome/service/service_process_prefs.cc
@@ -27,10 +27,9 @@ std::string ServiceProcessPrefs::GetString(
     const std::string& default_value) const {
   const Value* value;
   std::string result;
-  if (prefs_->GetValue(key, &value) != PersistentPrefStore::READ_OK ||
-      !value->GetAsString(&result)) {
+  if (!prefs_->GetValue(key, &value) || !value->GetAsString(&result))
     return default_value;
-  }
+
   return result;
 }
 
@@ -43,10 +42,9 @@ bool ServiceProcessPrefs::GetBoolean(const std::string& key,
                                      bool default_value) const {
   const Value* value;
   bool result = false;
-  if (prefs_->GetValue(key, &value) != PersistentPrefStore::READ_OK ||
-      !value->GetAsBoolean(&result)) {
+  if (!prefs_->GetValue(key, &value) || !value->GetAsBoolean(&result))
     return default_value;
-  }
+
   return result;
 }
 
@@ -58,10 +56,9 @@ int ServiceProcessPrefs::GetInt(const std::string& key,
                                 int default_value) const {
   const Value* value;
   int result = default_value;
-  if (prefs_->GetValue(key, &value) != PersistentPrefStore::READ_OK ||
-      !value->GetAsInteger(&result)) {
+  if (!prefs_->GetValue(key, &value) || !value->GetAsInteger(&result))
     return default_value;
-  }
+
   return result;
 }
 
@@ -72,7 +69,7 @@ void ServiceProcessPrefs::SetInt(const std::string& key, int value) {
 const DictionaryValue* ServiceProcessPrefs::GetDictionary(
     const std::string& key) const {
   const Value* value;
-  if (prefs_->GetValue(key, &value) != PersistentPrefStore::READ_OK ||
+  if (!prefs_->GetValue(key, &value) ||
       !value->IsType(Value::TYPE_DICTIONARY)) {
     return NULL;
   }
@@ -83,10 +80,8 @@ const DictionaryValue* ServiceProcessPrefs::GetDictionary(
 const base::ListValue* ServiceProcessPrefs::GetList(
     const std::string& key) const {
   const Value* value;
-  if (prefs_->GetValue(key, &value) != PersistentPrefStore::READ_OK ||
-    !value->IsType(Value::TYPE_LIST)) {
-      return NULL;
-  }
+  if (!prefs_->GetValue(key, &value) || !value->IsType(Value::TYPE_LIST))
+    return NULL;
 
   return static_cast<const ListValue*>(value);
 }