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

chrome/browser/ui/browser.h

Index: chrome/browser/ui/browser.h
diff --git a/chrome/browser/ui/browser.h b/chrome/browser/ui/browser.h
index 0fee68b7c1e9c9e33e3d884a9da82c28cf688834..b2346a0f76191f01db3f4d29bbaa92b74b811264 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -462,6 +462,8 @@ class Browser : public TabStripModelObserver,
   bool CanDragEnter(content::WebContents* source,
                     const content::DropData& data,
                     blink::WebDragOperationsMask operations_allowed) override;
+  content::SecurityStyle GetSecurityStyle(
+      const content::WebContents* web_contents) override;
 
   bool is_type_tabbed() const { return type_ == TYPE_TABBED; }
   bool is_type_popup() const { return type_ == TYPE_POPUP; }