Expand SecurityStyleChanged interfaces to include explanations

content/public/browser/security_style_explanation.cc

Index: content/public/browser/security_style_explanation.cc
diff --git a/content/public/browser/security_style_explanation.cc b/content/public/browser/security_style_explanation.cc
new file mode 100644
index 0000000000000000000000000000000000000000..122e926ef3a2e074269d3b94d96ed5a8664d81ab
--- /dev/null
+++ b/content/public/browser/security_style_explanation.cc
@@ -0,0 +1,21 @@
+// 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.
+
+#include "content/public/browser/security_style_explanation.h"
+
+namespace content {
+
+SecurityStyleExplanation::SecurityStyleExplanation() {
+}
+
+SecurityStyleExplanation::SecurityStyleExplanation(
+    const std::string& summary,
+    const std::string& description)
+    : summary(summary), description(description) {
+}
+
+SecurityStyleExplanation::~SecurityStyleExplanation() {
+}
+
+}  // namespace content