Expand SecurityStyleChanged interfaces to include explanations

content/public/browser/web_contents_observer.h

Index: content/public/browser/web_contents_observer.h
diff --git a/content/public/browser/web_contents_observer.h b/content/public/browser/web_contents_observer.h
index fe2dc9d1fc8dcc6e355999b6ff47937def0636fd..272c22540321001a4e32b708b021ec6f2e545561 100644
--- a/content/public/browser/web_contents_observer.h
+++ b/content/public/browser/web_contents_observer.h
@@ -177,8 +177,14 @@ class CONTENT_EXPORT WebContentsObserver : public IPC::Listener,
       const LoadCommittedDetails& details,
       const FrameNavigateParams& params) {}
 
-  // This method is invoked when the SecurityStyle of the WebContents changes.
-  virtual void SecurityStyleChanged(content::SecurityStyle security_style) {}
+  // This method is invoked when the SecurityStyle of the WebContents
+  // changes. |security_style| is the new
+  // SecurityStyle. |security_style_explanation| contains human-readable
+  // strings explaining why the SecurityStyle of the page has been
+  // downgraded.
+  virtual void SecurityStyleChanged(
+      SecurityStyle security_style,
+      const SecurityStyleExplanation& security_style_explanation) {}
 
   // This method is invoked once the window.document object of the main frame
   // was created.