Add WebSecurityOrigin::CanAccessFeatureRequiringSecureOrigin.

public/web/WebSecurityOrigin.h

Index: public/web/WebSecurityOrigin.h
diff --git a/public/web/WebSecurityOrigin.h b/public/web/WebSecurityOrigin.h
index c4c0c0507023645010b02311e6fad3972922ce0d..868d096cec00407b0146514961f8e8ca15da34eb 100644
--- a/public/web/WebSecurityOrigin.h
+++ b/public/web/WebSecurityOrigin.h
@@ -83,6 +83,13 @@ public:
     // from a given security origin to receive contents from a given URL.
     BLINK_EXPORT bool canRequest(const WebURL&) const;
 
+    // A "secure origin" as defined by [1] are those that load resources either
+    // from the local machine (necessarily trusted) or over the network from a
+    // cryptographically-authenticated server.
+    //
+    // [1] http://www.chromium.org/Home/chromium-security/security-faq#TOC-Which-origins-are-secure-
+    bool canAccessFeatureRequiringSecureOrigin(WebString& errorMessage) const;
+
     // Returns a string representation of the WebSecurityOrigin.  The empty
     // WebSecurityOrigin is represented by "null".  The representation of a
     // non-empty WebSecurityOrigin resembles a standard URL.