MD Settings: Add helper method for responding to cr.sendWithPromise.

chrome/browser/ui/webui/settings/md_settings_ui.h

Index: chrome/browser/ui/webui/settings/md_settings_ui.h
diff --git a/chrome/browser/ui/webui/settings/md_settings_ui.h b/chrome/browser/ui/webui/settings/md_settings_ui.h
index 55cede3fd47142a28c8323c68dedea926f929f26..f6c1859011e667d3cd607b2818add4a2c9dfe073 100644
--- a/chrome/browser/ui/webui/settings/md_settings_ui.h
+++ b/chrome/browser/ui/webui/settings/md_settings_ui.h
@@ -25,6 +25,12 @@ class SettingsPageUIHandler : public content::WebUIMessageHandler {
   // WebUIMessageHandler implementation.
   void RegisterMessages() override {}
 
+ protected:
+  // Helper method for responding to JS requests initiated with
+  // cr.sendWithPromise().
+  void CallJavascriptCallback(content::WebUI* webui,

[Dan Beam, 2016/01/27 00:23:57]

web_ui

[dpapad, 2016/01/27 00:45:24]

Removed.

+                              const base::Value& callbackId,

[Dan Beam, 2016/01/27 00:23:57]

callback_id

[dpapad, 2016/01/27 00:45:23]

Done.

+                              const base::Value& response);

[Dan Beam, 2016/01/27 00:23:57]

\n

[dpapad, 2016/01/27 00:45:24]

Done.

  private:
   DISALLOW_COPY_AND_ASSIGN(SettingsPageUIHandler);
 };