Make sure ShellIntegration::CommandLineArgsForLauncher respects the UserDataDir policy.

chrome/browser/policy/policy_path_parser_linux.cc

Index: chrome/browser/policy/policy_path_parser_linux.cc
diff --git a/chrome/browser/policy/policy_path_parser_linux.cc b/chrome/browser/policy/policy_path_parser_linux.cc
index a110017e4d7bc9c305e5e4a41bf3b72e564694f9..e0bed0986234efb7352c3451beeb68e565319935 100644
--- a/chrome/browser/policy/policy_path_parser_linux.cc
+++ b/chrome/browser/policy/policy_path_parser_linux.cc
@@ -53,6 +53,12 @@ base::FilePath::StringType ExpandPathVariables(
   return result;
 }
 
+void CheckUserDataDirPolicy(base::FilePath* user_data_dir) {
+  // This function is not implemented in Linux because we don't support the
+  // policy on this platform.
+  NOTREACHED();
+}
+
 }  // namespace path_parser
 
 }  // namespace policy