Change pnacl to read all resources from the extension.

ppapi/native_client/src/trusted/plugin/json_manifest.h

Index: ppapi/native_client/src/trusted/plugin/json_manifest.h
===================================================================
--- ppapi/native_client/src/trusted/plugin/json_manifest.h	(revision 115018)
+++ ppapi/native_client/src/trusted/plugin/json_manifest.h	(working copy)
@@ -69,6 +69,8 @@
                           ErrorInfo* error_info,
                           bool* is_portable) const;
 
+  // A JSON manifest does not allow access to extension URLs.
+  virtual bool PermitsExtensionUrls() const { return false; }
 
  private:
   NACL_DISALLOW_COPY_AND_ASSIGN(JsonManifest);