[Extensions] Use document url (not top url) for tab-specific permissions

extensions/renderer/extension_frame_helper.h

Index: extensions/renderer/extension_frame_helper.h
diff --git a/extensions/renderer/extension_frame_helper.h b/extensions/renderer/extension_frame_helper.h
index ecb5f29dd716259fc4bc4ae36c7073759892d93b..b28458f2d063db5b74ea3abcb9b4dd250d76e190 100644
--- a/extensions/renderer/extension_frame_helper.h
+++ b/extensions/renderer/extension_frame_helper.h
@@ -26,6 +26,10 @@ class ExtensionFrameHelper
                        Dispatcher* extension_dispatcher);
   ~ExtensionFrameHelper() override;
 
+  const std::string& tab_extension_owner_id() const {
+    return tab_extension_owner_id_;
+  }
+
  private:
   // RenderFrameObserver implementation.
   void DidCreateScriptContext(v8::Local<v8::Context>,
@@ -47,6 +51,12 @@ class ExtensionFrameHelper
                                  const Message& message);
   void OnExtensionDispatchOnDisconnect(int port_id,
                                        const std::string& error_message);
+  void OnSetTabExtensionOwner(const std::string& extension_id);
+
+  // The id of the extension that "owns" the tab if this is a chrome-extension
+  // page. If it's not a chrome-extension page, |tab_extension_owner_id_| is
+  // empty.
+  std::string tab_extension_owner_id_;
 
   Dispatcher* extension_dispatcher_;