[Fetch API] Unify stream-reader test expectations.

LayoutTests/TestExpectations

 # turn off Slimming Paint tests for all non-Linux platforms...
 crbug.com/453972 [ Mac ] virtual/slimmingpaint/ [ Skip ]
 crbug.com/453972 [ Win ] virtual/slimmingpaint/ [ Skip ]
 crbug.com/453972 [ Android ] virtual/slimmingpaint/ [ Skip ]
 # except for fast/block/, as a sanity test directory.
 crbug.com/453972 [ Mac ] virtual/slimmingpaint/fast/block [ Pass ]
 crbug.com/453972 [ Win ] virtual/slimmingpaint/fast/block [ Pass ]
 crbug.com/453972 [ Android ] virtual/slimmingpaint/fast/block [ Pass ]
 
 crbug.com/474117 compositing/overflow/overflow-positioning.html [ ImageOnlyFailure Pass ]
@@ skipping 1876 matching lines @@
 crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect-credentials.html [ Slow ]
 crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect-credentials-other-https.html [ Slow ]
 crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect.html [ Slow ]
 crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect-loop-base-https-other-https.html [ Slow ]
 crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect-loop.html [ Slow ]
 crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect-loop-other-https.html [ Slow ]
 crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect-nocors-base-https-other-https.html [ Slow ]
 crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect-nocors.html [ Slow ]
 crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect-nocors-other-https.html [ Slow ]
 crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect-other-https.html [ Slow ]
-crbug.com/483373 [ XP ] http/tests/fetch/serviceworker/stream-reader-base-https-other-https.html [ Pass Failure Timeout ]
-crbug.com/483377 [ Win Win7 XP ] http/tests/fetch/window/stream-reader-base-https-other-https.html [ Pass Failure Timeout ]
+crbug.com/472970 [ Win Mac ] http/tests/fetch/window/stream-reader.html [ Pass Failure Timeout ]
+crbug.com/472970 [ Win Mac ] http/tests/fetch/workers/stream-reader.html [ Pass Failure Timeout ]
+crbug.com/472970 [ Win Mac ] http/tests/fetch/serviceworker/stream-reader.html [ Pass Failure Timeout ]
+crbug.com/472970 [ Win Mac ] http/tests/fetch/window/stream-reader-base-https-other-https.html [ Pass Failure Timeout ]
+crbug.com/472970 [ Win Mac ] http/tests/fetch/workers/stream-reader-base-https-other-https.html [ Pass Failure Timeout ]
+crbug.com/472970 [ Win Mac ] http/tests/fetch/serviceworker/stream-reader-base-https-other-https.html [ Pass Failure Timeout ]
 
 crbug.com/480769 [ Linux Release ] http/tests/inspector/service-workers/service-worker-manager.html [ Crash Pass ]
 crbug.com/480769 http/tests/inspector/service-workers/service-workers-redundant.html [ Crash Pass Slow ]
 crbug.com/480769 [ Release ] http/tests/inspector/service-workers/service-worker-agents.html [ Crash Pass ]
 
 crbug.com/472330 virtual/slimmingpaint/fast/writing-mode/box-shadow-vertical-lr.html [ Skip ]
 crbug.com/472330 virtual/slimmingpaint/fast/writing-mode/box-shadow-vertical-rl.html [ Skip ]
 crbug.com/472330 virtual/slimmingpaint/fast/writing-mode/flipped-blocks-inline-map-local-to-container.html [ Skip ]
 
 crbug.com/453781 fast/hidpi/image-srcset-change-dynamically-from-js-1x.html [ Pass Failure ]
@@ skipping 122 matching lines @@
 crbug.com/473532 http/tests/inspector/stacktraces/csp-setTimeout-warning-contains-stacktrace.html [ Pass Failure ]
 
 crbug.com/473626 fast/forms/form-submission-cancelable.html [ Pass Timeout ]
 crbug.com/473626 virtual/slimmingpaint/fast/forms/form-submission-cancelable.html [ Pass Timeout ]
 crbug.com/461041 fast/forms/calendar-picker/month-picker-ax.html [ Pass Timeout ]
 crbug.com/473632 fast/dom/Geolocation/success-clear-watch.html [ Pass Timeout ]
 
 crbug.com/472905 inspector/elements/styles/page-reload-update-sidebar.html [ Pass Failure ]
 
 crbug.com/473718 http/tests/navigation/beacon-cross-origin-redirect.html [ Pass Failure ]
-crbug.com/473722 [ XP ] http/tests/fetch/workers/stream-reader.html [ Slow Timeout ]
-crbug.com/483379 [ Win7 ] http/tests/fetch/workers/stream-reader.html [ Pass Failure Timeout ]
 crbug.com/473725 [ Linux ] virtual/slimmingpaint/fast/forms/submit-change-fragment.html [ Pass Timeout ]
 
 crbug.com/453822 virtual/slimmingpaint/fast/forms/calendar-picker/datepicker-crash-after-keydown.html [ Crash Pass Timeout ]
 
 # Temporarily disabled due to a change in HTMLMediaElement behavior, I'll
 # update and reenable the test once the bugfix for 475244 lands in Chromium
 crbug.com/475244 media/video-durationchange-on-ended.html [ Pass Failure ]
 
 crbug.com/476913 [ Debug SnowLeopard ] virtual/antialiasedtext/fast/text/unicode-fallback-font.html [ Crash ]
 crbug.com/476913 [ Debug SnowLeopard ] fast/text/unicode-fallback-font.html [ Crash ]
 
-crbug.com/477252 [ Win ] http/tests/fetch/window/stream-reader.html [ Pass Timeout ]
-
 crbug.com/479164 inspector/geolocation-emulation-tests.html [ Pass Failure ]
 
 crbug.com/479181 inspector-protocol/animation/animation-multiple-frames.html [ Pass Failure ]
 
 crbug.com/479202 fast/forms/select/select-typeahead-with-spacekey.html [ Pass Failure ]
 crbug.com/479202 virtual/slimmingpaint/fast/forms/select/select-typeahead-with-spacekey.html [ Pass Failure ]
 
 crbug.com/480652 fast/events/window-onerror-04.html [ NeedsManualRebaseline ]
 crbug.com/480652 svg/dom/SVGViewSpec.html [ NeedsManualRebaseline ]
 crbug.com/480652 virtual/pointerevent/fast/events/window-onerror-04.html [ NeedsManualRebaseline ]
 crbug.com/480652 virtual/slimmingpaint/fast/events/window-onerror-04.html [ NeedsManualRebaseline ]