2 files changed, 13 insertions, 2 deletions
diff --git a/chrome/browser/renderer_host/render_view_host.cc b/chrome/browser/renderer_host/render_view_host.cc
index 41cbd00..95a53dd 100644
--- a/chrome/browser/renderer_host/render_view_host.cc
+++ b/chrome/browser/renderer_host/render_view_host.cc
@@ -1609,7 +1609,9 @@ void RenderViewHost::OnExtensionRequest(const std::string& name,
                                         bool has_callback) {
   if (!ChildProcessSecurityPolicy::GetInstance()->
           HasExtensionBindings(process()->id())) {
-    NOTREACHED() << "Blocked unauthorized use of extension bindings.";
+    // This can happen if someone uses window.open() to open an extension URL
+    // from a non-extension context.
+    BlockExtensionRequest(request_id);
     return;
   }
 
@@ -1623,6 +1625,11 @@ void RenderViewHost::SendExtensionResponse(int request_id, bool success,
       response, error));
 }
 
+void RenderViewHost::BlockExtensionRequest(int request_id) {
+  SendExtensionResponse(request_id, false, "",
+                        "Access to extension API denied.");
+}
+
 void RenderViewHost::OnExtensionPostMessage(
     int port_id, const std::string& message) {
   if (process()->profile()->GetExtensionMessageService()) {
diff --git a/chrome/browser/renderer_host/render_view_host.h b/chrome/browser/renderer_host/render_view_host.h
index 6381ef1..0fe33e8 100644
--- a/chrome/browser/renderer_host/render_view_host.h
+++ b/chrome/browser/renderer_host/render_view_host.h
@@ -418,11 +418,15 @@ class RenderViewHost : public RenderWidgetHost,
   // Creates a new RenderWidget with the given route id.
   void CreateNewWidget(int route_id, bool activatable);
 
-  // Senf the response to an extension api call.
+  // Send the response to an extension api call.
   void SendExtensionResponse(int request_id, bool success,
                              const std::string& response,
                              const std::string& error);
 
+  // Send a response to an extension api call that it was blocked for lack of
+  // permission.
+  void BlockExtensionRequest(int request_id);
+
   void SignalModalDialogEvent();
   void ResetModalDialogEvent();