[Fetch API] Put body members directly on Response/Request

LayoutTests/http/tests/serviceworker/resources/request-worker.js

Index: LayoutTests/http/tests/serviceworker/resources/request-worker.js
diff --git a/LayoutTests/http/tests/serviceworker/resources/request-worker.js b/LayoutTests/http/tests/serviceworker/resources/request-worker.js
index 8d5b99604f0bd994bc6dc7f0a1049d0df1156ba5..97427c79340bf0ead475f589c04c1668e44986ce 100644
--- a/LayoutTests/http/tests/serviceworker/resources/request-worker.js
+++ b/LayoutTests/http/tests/serviceworker/resources/request-worker.js
@@ -303,7 +303,7 @@ async_test(function(t) {
     assert_equals(
       getContentType(request.headers), 'test/type',
       'ContentType header of Request created with Blob body must be set.');
-    request.body.asText()
+    request.text()
       .then(function(result) {
           assert_equals(result, 'Test Blob',
                         'Creating a Request with Blob body should success.');
@@ -312,7 +312,7 @@ async_test(function(t) {
           assert_equals(
             getContentType(request.headers), 'text/plain;charset=UTF-8',
             'ContentType header of Request created with string must be set.');
-          return request.body.asText();
+          return request.text();
         })
       .then(function(result) {
           assert_equals(result, 'Test String',
@@ -323,7 +323,7 @@ async_test(function(t) {
           for (var i = 0; i < text.length; ++i)
             array[i] = text.charCodeAt(i);
           request = new Request(URL, {method: 'POST', body: array.buffer});
-          return request.body.asText();
+          return request.text();
         })
       .then(function(result) {
           assert_equals(
@@ -335,7 +335,7 @@ async_test(function(t) {
           for (var i = 0; i < text.length; ++i)
             array[i] = text.charCodeAt(i);
           request = new Request(URL, {method: 'POST', body: array});
-          return request.body.asText();
+          return request.text();
         })
       .then(function(result) {
           assert_equals(
@@ -348,7 +348,7 @@ async_test(function(t) {
           formData.append('sample file',
                           new File(['file content'], 'file.dat'));
           request = new Request(URL, {method: 'POST', body: formData});
-          return request.body.asText();
+          return request.text();
         })
       .then(function(result) {
           var reg = new RegExp('multipart\/form-data; boundary=(.*)');