Add base namespace to more values in sync and elsewhere.

sync/internal_api/change_record.cc

Index: sync/internal_api/change_record.cc
diff --git a/sync/internal_api/change_record.cc b/sync/internal_api/change_record.cc
index b3aeb995c7bb867e4510d2fdc36be0822251f7d3..4894b3ce9e24b4da87098ffeab1682dbda183989 100644
--- a/sync/internal_api/change_record.cc
+++ b/sync/internal_api/change_record.cc
@@ -17,8 +17,8 @@ ChangeRecord::ChangeRecord()
 
 ChangeRecord::~ChangeRecord() {}
 
-DictionaryValue* ChangeRecord::ToValue() const {
-  DictionaryValue* value = new DictionaryValue();
+base::DictionaryValue* ChangeRecord::ToValue() const {
+  base::DictionaryValue* value = new base::DictionaryValue();
   std::string action_str;
   switch (action) {
     case ACTION_ADD:
@@ -55,7 +55,7 @@ ExtraPasswordChangeRecordData::ExtraPasswordChangeRecordData(
 
 ExtraPasswordChangeRecordData::~ExtraPasswordChangeRecordData() {}
 
-DictionaryValue* ExtraPasswordChangeRecordData::ToValue() const {
+base::DictionaryValue* ExtraPasswordChangeRecordData::ToValue() const {
   return PasswordSpecificsDataToValue(unencrypted_);
 }