Cache Storage API tests: Fix WPT test bugs, remove redundant local copies

third_party/WebKit/LayoutTests/external/wpt/service-workers/cache-storage/script-tests/cache-put.js

 if (self.importScripts) {
     importScripts('/resources/testharness.js');
     importScripts('../resources/test-helpers.js');
 }
 
 var test_url = 'https://example.com/foo';
 var test_body = 'Hello world!';
 
 cache_test(function(cache) {
     var request = new Request(test_url);
@@ skipping 84 matching lines @@
           assert_equals(result.headers.get('Content-Type'), 'text/plain',
                         'Cache.put should store headers.');
           return result.text();
         })
       .then(function(body) {
           assert_equals(body, '',
                         'Cache.put should store response body.');
         });
   }, 'Cache.put with an empty response body');
 
-cache_test(function(cache) {
+cache_test(function(cache, test) {
     var request = new Request(test_url);
     var response = new Response('', {
         status: 206,
         headers: [['Content-Type', 'text/plain']]
       });
 
-    return assert_promise_rejects(
+    return promise_rejects(
+      test,
+      new TypeError(),
       cache.put(request, response),
-      new TypeError(),
       'Cache.put should reject 206 Responses with a TypeError.');
-  }, 'Cache.put with 206 response');
+  }, 'Cache.put with synthetic 206 response');
+
+cache_test(function(cache, test) {
+    var test_url = new URL('../resources/fetch-status.py?status=206', location.href).href;
+    var request = new Request(test_url);
+    var response;
+    return fetch(test_url)
+      .then(function(fetch_result) {
+          assert_equals(fetch_result.status, 206,
+                        'Test framework error: The status code should be 206.');
+          response = fetch_result.clone();
+          return promise_rejects(test, new TypeError, cache.put(request, fetch_result));
+        });
+  }, 'Cache.put with HTTP 206 response');
 
 cache_test(function(cache) {
     var test_url = new URL('../resources/fetch-status.py?status=500', location.href).href;
     var request = new Request(test_url);
     var response;
     return fetch(test_url)
       .then(function(fetch_result) {
           assert_equals(fetch_result.status, 500,
                         'Test framework error: The status code should be 500.');
           response = fetch_result.clone();
@@ skipping 188 matching lines @@
         })
       .then(function(response) {
           assert_response_equals(response, redirectResponse,
                                  'Redirect response is reproduced by the Cache API');
           assert_equals(response.headers.get('Location'), redirectURL,
                         'Location header is preserved by Cache API.');
         });
   }, 'Cache.put should store Response.redirect() correctly');
 
 done();