[Fixed Position] Update specs for coverage

Update specs to restore code coverage after changes for WTD-881.

platform/features/layout/test/elements/TelemetryProxySpec.js

@@ -30,6 +30,27 @@ define(
             it("exposes the element's id", function () {
                 expect(proxy.id).toEqual('test-id');
             });
+
+            it("allows title to be shown/hidden", function () {
+                // Initially, only showTitle and hideTitle are available
+                expect(proxy.hideTitle).toBeUndefined();
+                proxy.showTitle();
+
+                // Should have set titled state
+                expect(testElement.titled).toBeTruthy();
+
+                // Should also have changed methods available
+                expect(proxy.showTitle).toBeUndefined();
+                proxy.hideTitle();
+
+                // Should have cleared titled state
+                expect(testElement.titled).toBeFalsy();
+
+                // Available methods should have changed again
+                expect(proxy.hideTitle).toBeUndefined();
+                proxy.showTitle();
+            });
+
         });
     }
 );