Expand SecurityStyleChanged interfaces to include explanations

content/public/browser/security_style_explanation.h

Index: content/public/browser/security_style_explanation.h
diff --git a/content/public/browser/security_style_explanation.h b/content/public/browser/security_style_explanation.h
new file mode 100644
index 0000000000000000000000000000000000000000..0246a64c5bea7402c8b625373ea4aa3f7f198703
--- /dev/null
+++ b/content/public/browser/security_style_explanation.h
@@ -0,0 +1,29 @@
+// 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.
+
+#ifndef CONTENT_PUBLIC_BROWSER_SECURITY_STYLE_EXPLANATION_H_
+#define CONTENT_PUBLIC_BROWSER_SECURITY_STYLE_EXPLANATION_H_
+
+#include <string>
+
+namespace content {
+
+// A human-readable summary phrase and more detailed description of a
+// security property that was used to compute the SecurityStyle of a
+// resource. An example summary phrase would be "Expired Certificate",
+// with a description along the lines of "This site's certificate chain
+// contains errors (net::CERT_DATE_INVALID)".
+struct SecurityStyleExplanation {
+  SecurityStyleExplanation();
+  SecurityStyleExplanation(const std::string& summary,
+                           const std::string& description);
+  ~SecurityStyleExplanation();
+
+  std::string summary;
+  std::string description;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_SECURITY_STYLE_EXPLANATION_H_