Cache API should not match() HEAD requests

third_party/WebKit/LayoutTests/http/tests/cachestorage/script-tests/cache-keys.js

 if (self.importScripts) {
     importScripts('/resources/testharness.js');
     importScripts('../resources/test-helpers.js');
 }
 
+cache_test(cache => {
+    return cache.keys()
+      .then(requests => {
+          assert_equals(
+            requests.length, 0,
+            'Cache.keys should resolve to an empty array for an empty cache');
+        });
+  }, 'Cache.keys() called on an empty cache');
+
 prepopulated_cache_test(simple_entries, function(cache, entries) {
     return cache.keys('not-present-in-the-cache')
       .then(function(result) {
           assert_request_array_equals(
             result, [],
             'Cache.keys should resolve with an empty array on failure.');
         });
   }, 'Cache.keys with no matching entries');
 
 prepopulated_cache_test(simple_entries, function(cache, entries) {
@@ skipping 100 matching lines @@
               entries.catmandu.request,
               entries.cat_num_lives.request,
               entries.cat_in_the_hat.request,
               entries.non_2xx_response.request,
               entries.error_response.request
             ],
             'Cache.keys without parameters should match all entries.');
         });
   }, 'Cache.keys without parameters');
 
+prepopulated_cache_test(simple_entries, function(cache, entries) {
+    return cache.keys(new Request(entries.cat.request.url, {method: 'HEAD'}))
+      .then(function(result) {
+          assert_request_array_equals(
+            result, [],
+            'Cache.keys should not match HEAD request unless ignoreMethod ' +
+            'option is set.');
+        });
+  }, 'Cache.keys with a HEAD Request');
+
 done();