Check the format of an applicationServerKey when used to register a push subscription.

chrome/test/data/push_messaging/push_test.js

Index: chrome/test/data/push_messaging/push_test.js
diff --git a/chrome/test/data/push_messaging/push_test.js b/chrome/test/data/push_messaging/push_test.js
index 9a1336067db956d91f95e0205b977dca81d08427..99b4d8f4ed87beb7c9c6ccf61b808f5a50dd8b57 100644
--- a/chrome/test/data/push_messaging/push_test.js
+++ b/chrome/test/data/push_messaging/push_test.js
@@ -112,7 +112,7 @@ function documentSubscribePush() {
   }).catch(sendErrorToTest);
 }
 
-function documentSubscribePushBadKey() {
+function documentSubscribePushLongKey() {
   navigator.serviceWorker.ready.then(function(swRegistration) {
     var invalidApplicationServerKey = new Uint8Array(300);
     invalidApplicationServerKey.fill('0x05', 1, 300);
@@ -125,6 +125,39 @@ function documentSubscribePushBadKey() {
   }).catch(sendErrorToTest);
 }
 
+function documentSubscribePushShortKey() {
+  navigator.serviceWorker.ready.then(function(swRegistration) {
+    pushSubscriptionOptions.applicationServerKey = new Uint8Array().buffer;
+    return swRegistration.pushManager.subscribe(pushSubscriptionOptions)
+        .then(function(subscription) {
+          sendResultToTest(subscription.endpoint);
+        });
+  }).catch(sendErrorToTest);
+}
+function documentSubscribePushNonNumericKey() {
+  navigator.serviceWorker.ready.then(function(swRegistration) {
+    const invalidApplicationServerKey = Uint8Array.from("01234a56789");
+    pushSubscriptionOptions.applicationServerKey =
+        invalidApplicationServerKey.buffer;
+    return swRegistration.pushManager.subscribe(pushSubscriptionOptions)
+        .then(function(subscription) {
+          sendResultToTest(subscription.endpoint);
+        });
+  }).catch(sendErrorToTest);
+}
+
+function documentSubscribePushValidSenderId() {
+  navigator.serviceWorker.ready.then(function(swRegistration) {
+    let validApplicationServerKey = "123456789";
+    pushSubscriptionOptions.applicationServerKey =
+        validApplicationServerKey.buffer;
+    return swRegistration.pushManager.subscribe(pushSubscriptionOptions)
+        .then(function(subscription) {
+          sendResultToTest(subscription.endpoint);
+        });
+  }).catch(sendErrorToTest);
+}
+
 function workerSubscribePush() {
   // Send the message to the worker for it to subscribe
   navigator.serviceWorker.controller.postMessage({command: 'workerSubscribe'});