[ui/base;css] adding string template expression replacement

ui/base/template_expressions.h

Index: ui/base/template_expressions.h
diff --git a/ui/base/template_expressions.h b/ui/base/template_expressions.h
new file mode 100644
index 0000000000000000000000000000000000000000..3afde9e7ad6857ca4f54099095b24e248a353e10
--- /dev/null
+++ b/ui/base/template_expressions.h
@@ -0,0 +1,26 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This file defines utility functions for replacing template expressions.
+// For example "Hello ${name}" could have ${name} replaced by the user's name.
+
+#ifndef UI_BASE_TEMPLATE_EXPRESSIONS_H_
+#define UI_BASE_TEMPLATE_EXPRESSIONS_H_
+
+#include <map>
+#include <string>
+
+#include "ui/base/ui_base_export.h"
+
+namespace ui {
+
+// Replace ${foo} in the format string with the value for the foo key in
+// |subst|. Additionally, any number of consecutive '$' characters is replaced
+// by that number less one. Eg $$ becomes $, $$$ becomes $$, etc.
+UI_BASE_EXPORT std::string ReplaceTemplateExpressions(
+    const std::string& format_string,
+    const std::map<std::string, std::string>& substitutions);

[Dan Beam, 2015/07/09 19:26:01]

nit: \n

[dschuyler, 2015/07/14 00:56:17]

Done.

+}

[Dan Beam, 2015/07/09 19:26:01]

nit: }  // namespace ui

[dschuyler, 2015/07/14 00:56:17]

Done.

+
+#endif  // UI_BASE_TEMPLATE_EXPRESSIONS_H_