In extension messaging, use the sender frame's URL as the sender URL rather

chrome/renderer/extensions/runtime_custom_bindings.cc

Index: chrome/renderer/extensions/runtime_custom_bindings.cc
diff --git a/chrome/renderer/extensions/runtime_custom_bindings.cc b/chrome/renderer/extensions/runtime_custom_bindings.cc
index 4f364a36746849504981349c69c9e9300206b383..77b69ff618c14c36f6e90637d6f71e11c2158466 100644
--- a/chrome/renderer/extensions/runtime_custom_bindings.cc
+++ b/chrome/renderer/extensions/runtime_custom_bindings.cc
@@ -54,9 +54,9 @@ void RuntimeCustomBindings::OpenChannelToExtension(
   CHECK(args[0]->IsString() && args[1]->IsString());
 
   ExtensionMsg_ExternalConnectionInfo info;
-  info.source_id = context()->extension() ? context()->extension()->id() : "";
+  info.source_id = context()->GetExtensionID();
   info.target_id = *v8::String::Utf8Value(args[0]->ToString());
-  info.source_url = renderview->GetWebView()->mainFrame()->document().url();
+  info.source_url = context()->GetURL();
   std::string channel_name = *v8::String::Utf8Value(args[1]->ToString());
   int port_id = -1;
   renderview->Send(new ExtensionHostMsg_OpenChannelToExtension(