Add views::RichLabel, a class which creates multi-line text with mixed

ui/views/controls/styled_label_listener.h

Index: ui/views/controls/styled_label_listener.h
diff --git a/ui/views/controls/styled_label_listener.h b/ui/views/controls/styled_label_listener.h
new file mode 100644
index 0000000000000000000000000000000000000000..e04c299c457c97a1cff080709464ce9291db932e
--- /dev/null
+++ b/ui/views/controls/styled_label_listener.h
@@ -0,0 +1,26 @@
+// Copyright 2013 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.
+
+#ifndef UI_VIEWS_CONTROLS_STYLED_LABEL_LISTENER_H_
+#define UI_VIEWS_CONTROLS_STYLED_LABEL_LISTENER_H_
+
+namespace ui {
+class Range;
+}
+
+namespace views {
+
+// A listener interface for StyledLabel.
+class VIEWS_EXPORT StyledLabelListener {
+ public:
+  virtual void StyledLabelLinkClicked(const ui::Range& range,
+                                      int event_flags) = 0;
+
+ protected:
+  virtual ~StyledLabelListener() {}
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_CONTROLS_STYLED_LABEL_LISTENER_H_