Forward declare namespaces only in JSDoc

Forward declares symbol. This is an indication to the compiler that the
symbol may be used in the source yet is not required and may not be
provided in compilation.

The most common usage of forward declaration is code that takes a type
as a function parameter but does not need to require it. By forward
declaring instead of requiring, no hard dependency is made, and (if not
required elsewhere) the namespace may never be required and thus, not be
pulled into the JavaScript binary. If it is required elsewhere, it will
be type checked as normal.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=127095620

java/google/registry/ui/js/component.js

@@ -23,6 +23,8 @@ goog.require('goog.events.EventType');
 goog.require('registry.soy.forms');
 goog.require('registry.util');
 
+goog.forwardDeclare('registry.Console');
+
 
 
 /**