[fetch] Expose Request.body property.

This CL implements https://fetch.spec.whatwg.org/#body-mixin:
"""
Request includes Body;

The body attribute’s getter must return null if body is null and body’s stream otherwise.
"""
Since this feature is required for fetch upload streaming, this CL makes
it under the flag FetchUploadStreaming.

Fixed: 1105704
Change-Id: I334d9e1a3494ff4ba31efc9dc8b319294d2e19d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2297035Reviewed-by: Adam Rice <ricea@chromium.org>
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Yoichi Osato <yoichio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#789852}

third_party/blink/renderer/core/fetch/request.idl

@@ -50,6 +50,8 @@ enum ReferrerPolicy {
 
     [MeasureAs=RequestIsHistoryNavigation] readonly attribute boolean isHistoryNavigation;
     [RaisesException, CallWith=ScriptState, DoNotTestNewObject, NewObject] Request clone();
+
+    [RuntimeEnabled=FetchUploadStreaming] readonly attribute ReadableStream? body;
 };
 
 Request includes Body;

third_party/blink/web_tests/FlagExpectations/disable-features=OutOfBlinkCors

@@ -94,6 +94,10 @@ crbug.com/688906 http/tests/fetch/workers/fetch_upload-base-https-other-https.ht
 crbug.com/688906 http/tests/fetch/workers/fetch_upload.html [ Failure ]
 crbug.com/688906 external/wpt/fetch/api/basic/request-upload.any.html [ Failure ]
 crbug.com/688906 external/wpt/fetch/api/basic/request-upload.any.worker.html [ Failure ]
+crbug.com/688906 external/wpt/fetch/api/request/request-init-stream.any.html [ Failure ]
+crbug.com/688906 external/wpt/fetch/api/request/request-init-stream.any.serviceworker.html [ Failure ]
+crbug.com/688906 external/wpt/fetch/api/request/request-init-stream.any.sharedworker.html [ Failure ]
+crbug.com/688906 external/wpt/fetch/api/request/request-init-stream.any.worker.html [ Failure ]
 crbug.com/688906 virtual/omt-worker-fetch/external/wpt/fetch/api/basic/request-upload.any.html [ Failure ]
 crbug.com/688906 virtual/omt-worker-fetch/external/wpt/fetch/api/basic/request-upload.any.worker.html [ Failure ]
 crbug.com/688906 external/wpt/service-workers/service-worker/fetch-event.https.html [ Failure ]

third_party/blink/web_tests/TestExpectations

@@ -1482,6 +1482,10 @@ crbug.com/1053725 [ Win7 ] fast/forms/calendar-picker/date-picker-appearance-dis
 crbug.com/1091139 virtual/cors/external/wpt/fetch/api/basic/keepalive.html [ Skip ]
 crbug.com/1091139 virtual/cors/external/wpt/fetch/api/basic/request-upload.any.html [ Skip ]
 crbug.com/1091139 virtual/cors/external/wpt/fetch/api/basic/request-upload.any.worker.html [ Skip ]
+crbug.com/1091139 virtual/cors/external/wpt/fetch/api/request/request-init-stream.any.html [ Skip ]
+crbug.com/1091139 virtual/cors/external/wpt/fetch/api/request/request-init-stream.any.serviceworker.html [ Skip ]
+crbug.com/1091139 virtual/cors/external/wpt/fetch/api/request/request-init-stream.any.sharedworker.html [ Skip ]
+crbug.com/1091139 virtual/cors/external/wpt/fetch/api/request/request-init-stream.any.worker.html [ Skip ]
 crbug.com/1091139 virtual/cors/external/wpt/resource-timing/cors-preflight.any.html [ Skip ]
 crbug.com/1091139 virtual/cors/external/wpt/resource-timing/cors-preflight.any.worker.html [ Skip ]
 crbug.com/1091139 virtual/cors/external/wpt/resource-timing/redirects.sub.html [ Skip ]

third_party/blink/web_tests/external/wpt/fetch/api/idlharness.any-expected.txt

 This is a testharness.js-based test.
-Found 139 tests; 135 PASS, 4 FAIL, 0 TIMEOUT, 0 NOTRUN.
+Found 139 tests; 137 PASS, 2 FAIL, 0 TIMEOUT, 0 NOTRUN.
 PASS idl_test setup
 PASS idl_test validation
 PASS Partial interface mixin WindowOrWorkerGlobalScope: original interface mixin defined
@@ -60,7 +60,7 @@ FAIL Request interface: attribute isReloadNavigation assert_true: The prototype
 PASS Request interface: attribute isHistoryNavigation
 PASS Request interface: attribute signal
 PASS Request interface: operation clone()
-FAIL Request interface: attribute body assert_true: The prototype object must have a property "body" expected true got false
+PASS Request interface: attribute body
 PASS Request interface: attribute bodyUsed
 PASS Request interface: operation arrayBuffer()
 PASS Request interface: operation blob()
@@ -85,7 +85,7 @@ FAIL Request interface: new Request('about:blank') must inherit property "isRelo
 PASS Request interface: new Request('about:blank') must inherit property "isHistoryNavigation" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "signal" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "clone()" with the proper type
-FAIL Request interface: new Request('about:blank') must inherit property "body" with the proper type assert_inherits: property "body" not found in prototype chain
+PASS Request interface: new Request('about:blank') must inherit property "body" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "bodyUsed" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "arrayBuffer()" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "blob()" with the proper type

third_party/blink/web_tests/external/wpt/fetch/api/idlharness.any.serviceworker-expected.txt

 This is a testharness.js-based test.
-Found 139 tests; 135 PASS, 4 FAIL, 0 TIMEOUT, 0 NOTRUN.
+Found 139 tests; 137 PASS, 2 FAIL, 0 TIMEOUT, 0 NOTRUN.
 PASS idl_test setup
 PASS idl_test validation
 PASS Partial interface mixin WindowOrWorkerGlobalScope: original interface mixin defined
@@ -60,7 +60,7 @@ FAIL Request interface: attribute isReloadNavigation assert_true: The prototype
 PASS Request interface: attribute isHistoryNavigation
 PASS Request interface: attribute signal
 PASS Request interface: operation clone()
-FAIL Request interface: attribute body assert_true: The prototype object must have a property "body" expected true got false
+PASS Request interface: attribute body
 PASS Request interface: attribute bodyUsed
 PASS Request interface: operation arrayBuffer()
 PASS Request interface: operation blob()
@@ -85,7 +85,7 @@ FAIL Request interface: new Request('about:blank') must inherit property "isRelo
 PASS Request interface: new Request('about:blank') must inherit property "isHistoryNavigation" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "signal" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "clone()" with the proper type
-FAIL Request interface: new Request('about:blank') must inherit property "body" with the proper type assert_inherits: property "body" not found in prototype chain
+PASS Request interface: new Request('about:blank') must inherit property "body" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "bodyUsed" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "arrayBuffer()" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "blob()" with the proper type

third_party/blink/web_tests/external/wpt/fetch/api/idlharness.any.sharedworker-expected.txt

 This is a testharness.js-based test.
-Found 139 tests; 135 PASS, 4 FAIL, 0 TIMEOUT, 0 NOTRUN.
+Found 139 tests; 137 PASS, 2 FAIL, 0 TIMEOUT, 0 NOTRUN.
 PASS idl_test setup
 PASS idl_test validation
 PASS Partial interface mixin WindowOrWorkerGlobalScope: original interface mixin defined
@@ -60,7 +60,7 @@ FAIL Request interface: attribute isReloadNavigation assert_true: The prototype
 PASS Request interface: attribute isHistoryNavigation
 PASS Request interface: attribute signal
 PASS Request interface: operation clone()
-FAIL Request interface: attribute body assert_true: The prototype object must have a property "body" expected true got false
+PASS Request interface: attribute body
 PASS Request interface: attribute bodyUsed
 PASS Request interface: operation arrayBuffer()
 PASS Request interface: operation blob()
@@ -85,7 +85,7 @@ FAIL Request interface: new Request('about:blank') must inherit property "isRelo
 PASS Request interface: new Request('about:blank') must inherit property "isHistoryNavigation" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "signal" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "clone()" with the proper type
-FAIL Request interface: new Request('about:blank') must inherit property "body" with the proper type assert_inherits: property "body" not found in prototype chain
+PASS Request interface: new Request('about:blank') must inherit property "body" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "bodyUsed" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "arrayBuffer()" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "blob()" with the proper type

third_party/blink/web_tests/external/wpt/fetch/api/idlharness.any.worker-expected.txt

 This is a testharness.js-based test.
-Found 139 tests; 135 PASS, 4 FAIL, 0 TIMEOUT, 0 NOTRUN.
+Found 139 tests; 137 PASS, 2 FAIL, 0 TIMEOUT, 0 NOTRUN.
 PASS idl_test setup
 PASS idl_test validation
 PASS Partial interface mixin WindowOrWorkerGlobalScope: original interface mixin defined
@@ -60,7 +60,7 @@ FAIL Request interface: attribute isReloadNavigation assert_true: The prototype
 PASS Request interface: attribute isHistoryNavigation
 PASS Request interface: attribute signal
 PASS Request interface: operation clone()
-FAIL Request interface: attribute body assert_true: The prototype object must have a property "body" expected true got false
+PASS Request interface: attribute body
 PASS Request interface: attribute bodyUsed
 PASS Request interface: operation arrayBuffer()
 PASS Request interface: operation blob()
@@ -85,7 +85,7 @@ FAIL Request interface: new Request('about:blank') must inherit property "isRelo
 PASS Request interface: new Request('about:blank') must inherit property "isHistoryNavigation" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "signal" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "clone()" with the proper type
-FAIL Request interface: new Request('about:blank') must inherit property "body" with the proper type assert_inherits: property "body" not found in prototype chain
+PASS Request interface: new Request('about:blank') must inherit property "body" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "bodyUsed" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "arrayBuffer()" with the proper type
 PASS Request interface: new Request('about:blank') must inherit property "blob()" with the proper type

third_party/blink/web_tests/external/wpt/fetch/api/request/request-disturbed-expected.txt

 This is a testharness.js-based test.
-FAIL Request's body: initial state assert_equals: body's default value is null expected (object) null but got (undefined) undefined
+PASS Request's body: initial state
 PASS Request without body cannot be disturbed
 PASS Check cloning a disturbed request
 PASS Check creating a new request from a disturbed request
 FAIL Check creating a new request with a new body from a disturbed request Failed to construct 'Request': Cannot construct a Request with a Request object that has already been used.
-FAIL Input request used for creating new request became disturbed assert_not_equals: body should not be undefined got disallowed value undefined
-FAIL Input request used for creating new request became disturbed even if body is not used assert_not_equals: body should not be undefined got disallowed value undefined
+FAIL Input request used for creating new request became disturbed assert_equals: body should not change expected object "[object ReadableStream]" but got object "[object ReadableStream]"
+FAIL Input request used for creating new request became disturbed even if body is not used assert_equals: body should not change expected object "[object ReadableStream]" but got object "[object ReadableStream]"
 PASS Check consuming a disturbed request
 PASS Request construction failure should not set "bodyUsed"
 Harness: the test ran to completion.

third_party/blink/web_tests/external/wpt/fetch/api/request/request-init-stream.any-expected.txt

 This is a testharness.js-based test.
+PASS Constructing a Request with a stream holds the original object.
 FAIL Constructing a Request with a stream on which getReader() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
 FAIL Constructing a Request with a stream on which read() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
 FAIL Constructing a Request with a stream on which read() and releaseLock() are called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
-FAIL Constructing a Request with a Request on which body.getReader() is called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
-FAIL Constructing a Request with a Request on which body.getReader().read() is called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
-FAIL Constructing a Request with a Request on which read() and releaseLock() are called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
+FAIL Constructing a Request with a Request on which body.getReader() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
+FAIL Constructing a Request with a Request on which body.getReader().read() is called promise_test: Unhandled rejection with value: object "TypeError: Failed to construct 'Request': Cannot construct a Request with a Request object that has already been used."
+FAIL Constructing a Request with a Request on which read() and releaseLock() are called promise_test: Unhandled rejection with value: object "TypeError: Failed to construct 'Request': Cannot construct a Request with a Request object that has already been used."
 Harness: the test ran to completion.
 

third_party/blink/web_tests/external/wpt/fetch/api/request/request-init-stream.any.js

@@ -2,6 +2,12 @@
 
 "use strict";
 
+test(() => {
+  const stream = new ReadableStream();
+  const request = new Request("...", { method:"POST", body: stream });
+  assert_equals(request.body, stream);
+}, "Constructing a Request with a stream holds the original object.");
+
 async function assert_request(test, input, init) {
   assert_throws_js(TypeError, () => new Request(input, init), "new Request()");
   await promise_rejects_js(test, TypeError, fetch(input, init), "fetch()");

third_party/blink/web_tests/external/wpt/fetch/api/request/request-init-stream.any.serviceworker-expected.txt

 This is a testharness.js-based test.
+PASS Constructing a Request with a stream holds the original object.
 FAIL Constructing a Request with a stream on which getReader() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
 FAIL Constructing a Request with a stream on which read() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
 FAIL Constructing a Request with a stream on which read() and releaseLock() are called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
-FAIL Constructing a Request with a Request on which body.getReader() is called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
-FAIL Constructing a Request with a Request on which body.getReader().read() is called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
-FAIL Constructing a Request with a Request on which read() and releaseLock() are called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
+FAIL Constructing a Request with a Request on which body.getReader() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
+FAIL Constructing a Request with a Request on which body.getReader().read() is called promise_test: Unhandled rejection with value: object "TypeError: Failed to construct 'Request': Cannot construct a Request with a Request object that has already been used."
+FAIL Constructing a Request with a Request on which read() and releaseLock() are called promise_test: Unhandled rejection with value: object "TypeError: Failed to construct 'Request': Cannot construct a Request with a Request object that has already been used."
 Harness: the test ran to completion.
 

third_party/blink/web_tests/external/wpt/fetch/api/request/request-init-stream.any.sharedworker-expected.txt

 This is a testharness.js-based test.
+PASS Constructing a Request with a stream holds the original object.
 FAIL Constructing a Request with a stream on which getReader() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
 FAIL Constructing a Request with a stream on which read() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
 FAIL Constructing a Request with a stream on which read() and releaseLock() are called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
-FAIL Constructing a Request with a Request on which body.getReader() is called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
-FAIL Constructing a Request with a Request on which body.getReader().read() is called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
-FAIL Constructing a Request with a Request on which read() and releaseLock() are called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
+FAIL Constructing a Request with a Request on which body.getReader() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
+FAIL Constructing a Request with a Request on which body.getReader().read() is called promise_test: Unhandled rejection with value: object "TypeError: Failed to construct 'Request': Cannot construct a Request with a Request object that has already been used."
+FAIL Constructing a Request with a Request on which read() and releaseLock() are called promise_test: Unhandled rejection with value: object "TypeError: Failed to construct 'Request': Cannot construct a Request with a Request object that has already been used."
 Harness: the test ran to completion.
 

third_party/blink/web_tests/external/wpt/fetch/api/request/request-init-stream.any.worker-expected.txt

 This is a testharness.js-based test.
+PASS Constructing a Request with a stream holds the original object.
 FAIL Constructing a Request with a stream on which getReader() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
 FAIL Constructing a Request with a stream on which read() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
 FAIL Constructing a Request with a stream on which read() and releaseLock() are called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
-FAIL Constructing a Request with a Request on which body.getReader() is called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
-FAIL Constructing a Request with a Request on which body.getReader().read() is called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
-FAIL Constructing a Request with a Request on which read() and releaseLock() are called promise_test: Unhandled rejection with value: object "TypeError: Cannot read property 'getReader' of undefined"
+FAIL Constructing a Request with a Request on which body.getReader() is called assert_throws_js: new Request() function "() => new Request(input, init)" did not throw
+FAIL Constructing a Request with a Request on which body.getReader().read() is called promise_test: Unhandled rejection with value: object "TypeError: Failed to construct 'Request': Cannot construct a Request with a Request object that has already been used."
+FAIL Constructing a Request with a Request on which read() and releaseLock() are called promise_test: Unhandled rejection with value: object "TypeError: Failed to construct 'Request': Cannot construct a Request with a Request object that has already been used."
 Harness: the test ran to completion.
 

third_party/blink/web_tests/http/tests/serviceworker/webexposed/global-interface-listing-service-worker-expected.txt

@@ -1313,6 +1313,7 @@ interface ReportingObserver
     method takeRecords
 interface Request
     attribute @@toStringTag
+    getter body
     getter bodyUsed
     getter cache
     getter credentials

third_party/blink/web_tests/webexposed/global-interface-listing-dedicated-worker-expected.txt

@@ -1247,6 +1247,7 @@ Starting worker: resources/global-interface-listing-worker.js
 [Worker]     method takeRecords
 [Worker] interface Request
 [Worker]     attribute @@toStringTag
+[Worker]     getter body
 [Worker]     getter bodyUsed
 [Worker]     getter cache
 [Worker]     getter credentials

third_party/blink/web_tests/webexposed/global-interface-listing-expected.txt

@@ -6699,6 +6699,7 @@ interface ReportingObserver
     method takeRecords
 interface Request
     attribute @@toStringTag
+    getter body
     getter bodyUsed
     getter cache
     getter credentials

third_party/blink/web_tests/webexposed/global-interface-listing-shared-worker-expected.txt

@@ -1203,6 +1203,7 @@ Starting worker: resources/global-interface-listing-worker.js
 [Worker]     method takeRecords
 [Worker] interface Request
 [Worker]     attribute @@toStringTag
+[Worker]     getter body
 [Worker]     getter bodyUsed
 [Worker]     getter cache
 [Worker]     getter credentials