Add deprecation message for top navigations from sandbox w/ 'allow-top-navigation' but no gesture

third_party/WebKit/Source/core/frame/LocalFrame.cpp

Index: third_party/WebKit/Source/core/frame/LocalFrame.cpp
diff --git a/third_party/WebKit/Source/core/frame/LocalFrame.cpp b/third_party/WebKit/Source/core/frame/LocalFrame.cpp
index 9f754700b681b8db9480cfba98761e51c2171fef..6f1cd6a70bfa466295117abd93275ada2f6361ed 100644
--- a/third_party/WebKit/Source/core/frame/LocalFrame.cpp
+++ b/third_party/WebKit/Source/core/frame/LocalFrame.cpp
@@ -466,26 +466,35 @@ SecurityContext* LocalFrame::securityContext() const {
   return document();
 }
 
-void LocalFrame::printNavigationErrorMessage(const Frame& targetFrame,
-                                             const char* reason) {
+String LocalFrame::getTargetFrameDescription(const Frame& targetFrame) const {
   // URLs aren't available for RemoteFrames, so the error message uses their
   // origin instead.
-  String targetFrameDescription =
-      targetFrame.isLocalFrame()
-          ? "with URL '" +
-                toLocalFrame(targetFrame).document()->url().getString() + "'"
-          : "with origin '" +
-                targetFrame.securityContext()->getSecurityOrigin()->toString() +
-                "'";
+  return targetFrame.isLocalFrame()
+             ? "with URL '" +
+                   toLocalFrame(targetFrame).document()->url().getString() + "'"
+             : "with origin '" +
+                   targetFrame.securityContext()
+                       ->getSecurityOrigin()
+                       ->toString() +
+                   "'";
+}
+
+void LocalFrame::printNavigationErrorMessage(const Frame& targetFrame,
+                                             const char* reason) {
   String message =
       "Unsafe JavaScript attempt to initiate navigation for frame " +
-      targetFrameDescription + " from frame with URL '" +
+      getTargetFrameDescription(targetFrame) + " from frame with URL '" +
       document()->url().getString() + "'. " + reason + "\n";
 
   domWindow()->printErrorMessage(message);
 }
 
-void LocalFrame::printNavigationWarning(const String& message) {
+void LocalFrame::printNavigationWarning(const Frame& targetFrame,
+                                        const char* reason) {
+  String message = "Frame with URL '" + document()->url().getString() +
+                   "' attempted to navigate its top-level window " +
+                   getTargetFrameDescription(targetFrame) + ". " + reason +
+                   "\n";
   m_console->addMessage(
       ConsoleMessage::create(JSMessageSource, WarningMessageLevel, message));
 }