Add base namespace to more values in sync and elsewhere.

sync/protocol/sync_protocol_error.cc

Index: sync/protocol/sync_protocol_error.cc
diff --git a/sync/protocol/sync_protocol_error.cc b/sync/protocol/sync_protocol_error.cc
index ce55bcdebd0f85acad7a2961c20aa52d7f5c3076..cd22e9a46f600537df04ba33d6d49e434bd485b1 100644
--- a/sync/protocol/sync_protocol_error.cc
+++ b/sync/protocol/sync_protocol_error.cc
@@ -51,8 +51,8 @@ SyncProtocolError::SyncProtocolError()
 SyncProtocolError::~SyncProtocolError() {
 }
 
-DictionaryValue* SyncProtocolError::ToValue() const {
-  DictionaryValue* value = new DictionaryValue();
+base::DictionaryValue* SyncProtocolError::ToValue() const {
+  base::DictionaryValue* value = new base::DictionaryValue();
   value->SetString("ErrorType",
                    GetSyncErrorTypeString(error_type));
   value->SetString("ErrorDescription", error_description);