service worker: Don't control a subframe of an insecure context

third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp

Index: third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp
diff --git a/third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp b/third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp
index e7012fddde34d3dcb282ed483bf29ac35a3bc28d..4c92d2bee1fb280b7384596e47472ca474fef906 100644
--- a/third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp
+++ b/third_party/WebKit/Source/platform/weborigin/SecurityOrigin.cpp
@@ -359,6 +359,15 @@ bool SecurityOrigin::isPotentiallyTrustworthy() const
     return false;
 }
 
+bool SecurityOrigin::isPotentiallyTrustworthy(String* errorMessage) const
+{
+    if (isPotentiallyTrustworthy())
+        return true;
+    if (errorMessage)
+        *errorMessage = isPotentiallyTrustworthyErrorMessage();
+    return false;
+}
+
 // static
 String SecurityOrigin::isPotentiallyTrustworthyErrorMessage()
 {