Service Worker: Cache.put() consumes request/response bodies

LayoutTests/http/tests/serviceworker/resources/cache-match-worker.js

 importScripts('worker-testharness.js');
 importScripts('/resources/testharness-helpers.js');
 
 // A set of Request/Response pairs to be used with prepopulated_cache_test().
 var simple_entries = [
   {
     name: 'a',
     request: new Request('http://example.com/a'),
     response: new Response('')
   },
@@ skipping 492 matching lines @@
     var request = new Request('http://example.com');
     var response;
     var request_url = new URL('simple.txt', location.href).href;
     return fetch(request_url)
       .then(function(fetch_result) {
           response = fetch_result;
           assert_equals(
             response.url, request_url,
             '[https://fetch.spec.whatwg.org/#dom-response-url] ' +
             'Reponse.url should return the URL of the response.');
-          return cache.put(request, response);
+          return cache.put(request, response.clone());
         })
       .then(function() {
           return cache.match(request.url);
         })
       .then(function(result) {
           assert_object_equals(
             result, response,
             'Cache.match should return a Response object that has the same ' +
             'properties as the stored response.');
           return cache.match(response.url);
@@ skipping 43 matching lines @@
 // {request: <Request object>, response: <Response object>}. There's no
 // guarantee on the order in which entries will be added to the cache.
 //
 // |test_function| should return a Promise that can be used with promise_test.
 function prepopulated_cache_test(entries, test_function, description) {
   cache_test(function(cache) {
       var p = Promise.resolve();
       var hash = {};
       entries.forEach(function(entry) {
           p = p.then(function() {
-              return cache.put(entry.request, entry.response)
+              return cache.put(entry.request.clone(),
+                               entry.response.clone())
                 .catch(function(e) {
                     assert_unreached('Test setup failed for entry ' +
                                      entry.name + ': ' + e);
                   });
             });
           hash[entry.name] = entry;
         });
       p = p.then(function() {
           assert_equals(Object.keys(hash).length, entries.length);
         });
 
       return p.then(function() {
           return test_function(cache, hash);
         });
     }, description);
 }