Add SecurityStateModelClient interface and implementation

chrome/browser/ssl/security_state_model.h

Index: chrome/browser/ssl/security_state_model.h
diff --git a/chrome/browser/ssl/security_state_model.h b/chrome/browser/ssl/security_state_model.h
index 8989efb676d4dc249f84dd745deebe3db9b9db4d..f4ad69939d6a1e56792367a33495b671b70b302a 100644
--- a/chrome/browser/ssl/security_state_model.h
+++ b/chrome/browser/ssl/security_state_model.h
@@ -19,6 +19,7 @@ class WebContents;
 }  // namespace content
 
 class Profile;
+class SecurityStateModelDelegate;
 
 // SecurityStateModel provides high-level security information about a
 // page or request. It is attached to a WebContents and will provide the
@@ -135,6 +136,7 @@ class SecurityStateModel
   static void SecurityInfoForRequest(const GURL& url,
                                      const content::SSLStatus& ssl,
                                      Profile* profile,
+                                     bool used_known_mitm_certificate,
                                      SecurityInfo* security_info);
 
  private:
@@ -151,6 +153,11 @@ class SecurityStateModel
   mutable GURL visible_url_;
   mutable content::SSLStatus visible_ssl_status_;
 
+  // TODO(estark): The SecurityStateModel temporarily owns and
+  // instantiates this member, but it will soon be injected, once the
+  // model is compnentized. https://crbug.com/515071
+  scoped_ptr<SecurityStateModelDelegate> delegate_;
+
   DISALLOW_COPY_AND_ASSIGN(SecurityStateModel);
 };