Make canNavigate() OOPI-friendly

Source/core/frame/LocalFrame.cpp

Index: Source/core/frame/LocalFrame.cpp
diff --git a/Source/core/frame/LocalFrame.cpp b/Source/core/frame/LocalFrame.cpp
index 278cb3a09b112ac93be6757a3439a234c02f5131..22cbf3bb69ae11ac5d244e2f9a3da780f6dbbb44 100644
--- a/Source/core/frame/LocalFrame.cpp
+++ b/Source/core/frame/LocalFrame.cpp
@@ -298,6 +298,18 @@ bool LocalFrame::checkLoadComplete()
     return loader().checkLoadCompleteForThisFrame();
 }
 
+void LocalFrame::printNavigationErrorMessage(const Frame& targetFrame, const char* reason)
+{
+    if (!targetFrame.isLocalFrame())
+        return;
+
+    const LocalFrame& targetLocalFrame = toLocalFrameTemporary(targetFrame);
+    String message = "Unsafe JavaScript attempt to initiate navigation for frame with URL '" + targetLocalFrame.document()->url().string() + "' from frame with URL '" + document()->url().string() + "'. " + reason + "\n";
+
+    // FIXME: should we print to the console of the document performing the navigation instead?
+    targetLocalFrame.localDOMWindow()->printErrorMessage(message);
+}
+
 void LocalFrame::disconnectOwnerElement()
 {
     if (owner()) {