Integrate About page into Settings for Chrome OS settings in a window.

chrome/browser/ui/webui/help/help_handler.h

Index: chrome/browser/ui/webui/help/help_handler.h
diff --git a/chrome/browser/ui/webui/help/help_handler.h b/chrome/browser/ui/webui/help/help_handler.h
index 812f40b1990a879b8364d81b9bff1c77052d3258..72d8fefecc47ab986dfefd0e1bd47e7e3120dc74 100644
--- a/chrome/browser/ui/webui/help/help_handler.h
+++ b/chrome/browser/ui/webui/help/help_handler.h
@@ -18,10 +18,6 @@
 #include "chrome/browser/chromeos/version_loader.h"
 #endif  // defined(OS_CHROMEOS)
 
-namespace content {
-class WebUIDataSource;
-}
-
 // WebUI message handler for the help page.
 class HelpHandler : public content::WebUIMessageHandler,
                     public content::NotificationObserver {
@@ -32,8 +28,8 @@ class HelpHandler : public content::WebUIMessageHandler,
   // WebUIMessageHandler implementation.
   virtual void RegisterMessages() OVERRIDE;
 
-  // Fills |source| with string values for the UI.
-  void GetLocalizedValues(content::WebUIDataSource* source);
+  // Adds string values for the UI to |localized_strings|.
+  static void GetLocalizedValues(base::DictionaryValue* localized_strings);

[Dan Beam, 2014/08/13 02:50:46]

Y U NO FORWARD DECLARE DictionaryValue?

[michaelpg, 2014/08/13 08:12:11]

let me know if this is overboard or correct

 
   // NotificationObserver implementation.
   virtual void Observe(int type, const content::NotificationSource& source,