Introduce browser-side plumbing for sending the lock icon status to DevTools.

content/public/browser/web_contents_delegate.cc

Index: content/public/browser/web_contents_delegate.cc
diff --git a/content/public/browser/web_contents_delegate.cc b/content/public/browser/web_contents_delegate.cc
index b1fc250aa40cbc0c9f165171a51ad8169d50a0e7..aab5d99d40b484f8f9f7176042554f22f80c31c4 100644
--- a/content/public/browser/web_contents_delegate.cc
+++ b/content/public/browser/web_contents_delegate.cc
@@ -10,6 +10,7 @@
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/bindings_policy.h"
+#include "content/public/common/security_style.h"
 #include "content/public/common/url_constants.h"
 #include "ui/gfx/geometry/rect.h"
 
@@ -225,4 +226,9 @@ bool WebContentsDelegate::SaveFrame(const GURL& url, const Referrer& referrer) {
   return false;
 }
 
+SecurityStyle WebContentsDelegate::GetSecurityStyle(
+    const WebContents* web_contents) {
+  return content::SECURITY_STYLE_UNKNOWN;
+}
+
 }  // namespace content