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

third_party/WebKit/Source/web/WebFrame.cpp

Index: third_party/WebKit/Source/web/WebFrame.cpp
diff --git a/third_party/WebKit/Source/web/WebFrame.cpp b/third_party/WebKit/Source/web/WebFrame.cpp
index 1c4b5b4cce46d5568969978b2dec78a3d8687ee9..89a33fd0ba39ed929698f0a8f40e2c83e1748942 100644
--- a/third_party/WebKit/Source/web/WebFrame.cpp
+++ b/third_party/WebKit/Source/web/WebFrame.cpp
@@ -285,6 +285,14 @@ WebFrame* WebFrame::fromFrameOwnerElement(const WebElement& webElement)
     return fromFrame(toHTMLFrameOwnerElement(element)->contentFrame());
 }
 
+bool WebFrame::canHaveSecureChild() const
+{
+    Frame* frame = toImplBase()->frame();
+    if (!frame)
+        return false;
+    return frame->canHaveSecureChild();
+}
+
 bool WebFrame::isLoading() const
 {
     if (Frame* frame = toImplBase()->frame())