Add base namespace to more values in sync and elsewhere.

sync/test/accounts_client/test_accounts_client_unittest.cc

Index: sync/test/accounts_client/test_accounts_client_unittest.cc
diff --git a/sync/test/accounts_client/test_accounts_client_unittest.cc b/sync/test/accounts_client/test_accounts_client_unittest.cc
index ff405f6bcb3ff9dea875aa7e830191870b1f1fbf..c478cd435282dba28d095bd766a08bb63553008a 100644
--- a/sync/test/accounts_client/test_accounts_client_unittest.cc
+++ b/sync/test/accounts_client/test_accounts_client_unittest.cc
@@ -61,7 +61,7 @@ TEST(TestAccountsClientTest, ClaimAccountSuccess) {
   usernames.push_back("foo2@gmail.com");
   NoNetworkTestAccountsClient client(kServer, kAccountSpace, usernames);
 
-  DictionaryValue success_dict;
+  base::DictionaryValue success_dict;
   success_dict.Set("username", new StringValue(kUsername));
   success_dict.Set("account_space", new StringValue(kAccountSpace));
   success_dict.Set("session_id", new StringValue(kSessionId));