Mojo: add support for cookies to HTMLViewer.

mojo/services/public/interfaces/network/cookie_store.mojom

Index: mojo/services/public/interfaces/network/cookie_store.mojom
diff --git a/mojo/shell/external_service.mojom b/mojo/services/public/interfaces/network/cookie_store.mojom
similarity index 61%
copy from mojo/shell/external_service.mojom
copy to mojo/services/public/interfaces/network/cookie_store.mojom
index e08f71fe504dc07219ad6058f01a4c623f36c1a6..7795f884bafc57bd5b33a82f6af79d2cc043a521 100644
--- a/mojo/shell/external_service.mojom
+++ b/mojo/services/public/interfaces/network/cookie_store.mojom
@@ -4,8 +4,9 @@
 
 module mojo {
 
-interface ExternalService {
-  Activate(handle<message_pipe> service_provider_handle);
+interface CookieStore {
+  Get(string url) => (string cookies);

[jamesr, 2014/07/22 23:53:44]

would be nice to have a type for URLs in order to do some validation (it'd still
serialize as a string, i suppose)

+  Set(string url, string cookie) => (bool success);
 };
 
 }