Expose Durable Storage API to script

public/platform/modules/permissions/WebPermissionClient.h

Index: public/platform/modules/permissions/WebPermissionClient.h
diff --git a/public/platform/modules/permissions/WebPermissionClient.h b/public/platform/modules/permissions/WebPermissionClient.h
index efc8811b81bb5f4f33b96c8a9b1edb567632bad7..648c6d12f643eafa8f3e163ab94dee2133bc6498 100644
--- a/public/platform/modules/permissions/WebPermissionClient.h
+++ b/public/platform/modules/permissions/WebPermissionClient.h
@@ -20,6 +20,9 @@ class WebURL;
 // permission query to requesting new permissions.
 class WebPermissionClient {
 public:
+
+    virtual void requestDurablePermission(const WebURL&, WebPermissionQueryCallback*) { }

[mlamouri (slow - plz ping), 2015/07/16 10:12:18]

This is simply requestPermission) without the type specified, right? lalitm@ is
working on implementing that and has CLs waiting for reviews. You guys might
want to sync.

[dgrogan, 2015/07/16 19:15:52]

That's right.
Good to hear. I figured this was a placeholder and would either be removed in
favor of or evolve into the generic version. I will ping him.

+
     // Query the permission status of a given origin for a specific permission.
     virtual void queryPermission(WebPermissionType, const WebURL&, WebPermissionQueryCallback*) { }