S13nServiceWorker: Support network fallback with blob request body.

service-workers/service-worker/fetch-event.https.html

@@ -456,6 +456,43 @@
         });
   }, 'FetchEvent#body is a string');
 
+// Test that the request body is sent to network upon network fallback,
+// for a string body.
+promise_test(t => {
+    // Set scope to "?ignore" so the service worker falls back to network
+    // for the main resource request, and add a suffix to avoid colliding
+    // with other tests.
+    const scope = 'resources/?ignore-for-request-body-fallback-string';
+    let frame;
+
+    return service_worker_unregister_and_register(t, worker, scope)
+      .then(reg => {
+          add_completion_callback(() => { reg.unregister(); });
+          return wait_for_state(t, reg.installing, 'activated');
+        })
+      .then(() => {
+          return with_iframe(scope); })
+      .then(f => {
+          frame = f;
+          // Add "?ignore" so the service worker falls back to echo-content.py.
+          const echo_url = '/fetch/api/resources/echo-content.py?ignore';
+          return frame.contentWindow.fetch(echo_url, {
+              method: 'POST',
+              body: 'i am the request body'
+            });
+        })
+      .then(response => {
+          return response.text();
+        })
+      .then(response_text => {
+          frame.remove();
+          assert_equals(
+              response_text,
+              'i am the request body',
+              'the network fallback request should include the request body');
+        });
+  }, 'FetchEvent#body is a string and is passed to network fallback');
+
 // Test that the service worker can read FetchEvent#body when it is a blob.
 // It responds with request body it read.
 promise_test(t => {
@@ -489,6 +526,44 @@
         });
   }, 'FetchEvent#body is a blob');
 
+// Test that the request body is sent to network upon network fallback,
+// for a blob body.
+promise_test(t => {
+    // Set scope to "?ignore" so the service worker falls back to network
+    // for the main resource request, and add a suffix to avoid colliding
+    // with other tests.
+    const scope = 'resources/simple.html?ignore-for-request-body-fallback-blob';
+    let frame;
+
+    return service_worker_unregister_and_register(t, worker, scope)
+      .then(reg => {
+          add_completion_callback(() => { reg.unregister(); });
+          return wait_for_state(t, reg.installing, 'activated');
+        })
+      .then(() => {
+          return with_iframe(scope); })
+      .then(f => {
+          frame = f;
+          const blob = new Blob(['it\'s me the blob', ' ', 'and more blob!']);
+          // Add "?ignore" so the service worker falls back to echo-content.py.
+          const echo_url = '/fetch/api/resources/echo-content.py?ignore';
+          return frame.contentWindow.fetch(echo_url, {
+              method: 'POST',
+              body: blob
+            });
+        })
+      .then(response => {
+          return response.text();
+        })
+      .then(response_text => {
+          frame.remove();
+          assert_equals(
+              response_text,
+              'it\'s me the blob and more blob!',
+              'the network fallback request should include the request body');
+        });
+  }, 'FetchEvent#body is a blob and is passed to network fallback');
+
 promise_test(async (t) => {
     const scope = 'resources/simple.html?keepalive';