ppapi: PPB_VpnProvider: Implement permission check

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 298a968259a5bb352b65a9ce81baba52ade76ff5..3fa24107b43162f0226c8c6af387248b113365ad 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -587,6 +587,11 @@ class CONTENT_EXPORT ContentBrowserClient {
                                     bool private_api,
                                     const SocketPermissionRequest* params);
 
+  // Returns true if the "vpnProvider" permission is allowed from the given
+  // |browser_context| and |url|.
+  virtual bool IsPepperVpnProviderAPIAllowed(BrowserContext* browser_context,
+                                             const GURL& url);
+
   // Returns an implementation of a file selecition policy. Can return nullptr.
   virtual ui::SelectFilePolicy* CreateSelectFilePolicy(
       WebContents* web_contents);