Update Cache.put() test to accept string as request

Per spec, the method signature is:

Promise<Response> put((Request or USVString) request, Response response);

So passing a string for request is perfectly valid. And thanks to the
wonders of Web IDL + JavaScript, anything else passed in other than a
Request will be coerced to a string, too.

R=asanka@chromium.org
BUG=374802

Review URL: https://codereview.chromium.org/677533002

git-svn-id: svn://svn.chromium.org/blink/trunk@184371 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/http/tests/serviceworker/cache-put-expected.txt

@@ -7,7 +7,7 @@ FAIL Cache.put with a Response containing an empty URL assert_equals: Cache.put
 PASS Cache.put with an empty response body 
 PASS Cache.put with HTTP 500 response 
 FAIL Cache.put called twice with same Request and different Responses Entry already exists.
-FAIL Cache.put with an invalid request assert_promise_rejects: Cache.put should only accept a Request object as the request. Promise did not reject.
+PASS Cache.put with an string request 
 PASS Cache.put with an invalid response 
 PASS Cache.put with a non-HTTP/HTTPS request 
 FAIL Cache.put with a relative URL assert_equals: Cache.put should accept a relative URL as the request. :[object].url expected "" but got "http://127.0.0.1:8000/serviceworker/resources/relative-url"

third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/cache-put-worker.js

@@ -154,11 +154,15 @@ cache_test(function(cache) {
   }, 'Cache.put called twice with same Request and different Responses');
 
 cache_test(function(cache) {
-    return assert_promise_rejects(
-      cache.put('http://example.com/foo', new_test_response()),
-      new TypeError(),
-      'Cache.put should only accept a Request object as the request.');
-  }, 'Cache.put with an invalid request');
+    var url = 'http://example.com/foo';
+    return cache.put(url, new_test_response('some body'))
+      .then(function() { return cache.match(url); })
+      .then(function(response) { return response.text(); })
+      .then(function(body) {
+          assert_equals(body, 'some body',
+                        'Cache.put should accept a string as request.');
+      });
+  }, 'Cache.put with an string request');
 
 cache_test(function(cache) {
     return assert_promise_rejects(