[Battery] Allow usage from SecureContext or top-level browsing context only.

third_party/WebKit/LayoutTests/battery-status/detached-no-crash.html

Index: third_party/WebKit/LayoutTests/battery-status/detached-no-crash.html
diff --git a/third_party/WebKit/LayoutTests/battery-status/detached-no-crash.html b/third_party/WebKit/LayoutTests/battery-status/detached-no-crash.html
index 3caf6e0543c46182c722c6e673fdf3b1c34aa7ae..58cbb5de86dd2917d9bac478527b387725c9605f 100644
--- a/third_party/WebKit/LayoutTests/battery-status/detached-no-crash.html
+++ b/third_party/WebKit/LayoutTests/battery-status/detached-no-crash.html
@@ -18,8 +18,15 @@ function processMessage(event) {
         w.close();
         w = null;
     } else if (event.data == "closed") {
-        shouldBeUndefined("nav.getBattery()");
-        finishJSTest();
+      nav.getBattery().then(battery => {
+        assert_unreachable('getBattery should reject on a closed window');
+      })
+      .catch(error => {
+        // DOMException.SECURITY_ERR = 18.
+        debug('Error Code is ' + error.code);
+        assert_equals(error.code, DOMException.SECURITY_ERR);
+      });
+      setTimeout(finishJSTest, 0);
     }
 }