Mark http/tests/fetch tests as slow on Windows.

LayoutTests/SlowTests

 # See http://www.chromium.org/developers/testing/webkit-layout-tests/testexpectations for more information on this file.
 
 # This file should only mark tests as Slow. If they are failing in some other way, that listing should be in TestExpectations.
 # Lines listed in both files will have the *union* of the expectations.
 
 # In general, we should list tests in this file if they are slower than ~30% of the default timeout time, as we
 # can see a 3x variance or more in test times on the bots. In practice, this means that any test that takes longer
 # than 2 seconds in Release mode or 6 seconds in Debug mode should be listed here.
 
 crbug.com/24182 [ Debug ] storage/indexeddb/objectstore-cursor.html [ Slow ]
@@ skipping 189 matching lines @@
 crbug.com/331186 [ Debug ] css3/flexbox/position-absolute-child.html [ Slow ]
 
 crbug.com/362509 [ Debug ] fast/parser/xml-error-adopted.xml [ Slow ]
 
 crbug.com/363029 virtual/gpu/fast/canvas/canvas-composite-stroke-alpha.html [ Slow ]
 
 crbug.com/372424 fast/dom/DOMImplementation/createDocument-with-used-doctype.html [ Slow ]
 
 crbug.com/372424 http/tests/serviceworker/chromium/registration-stress.html [ Slow ]
 crbug.com/448670 http/tests/serviceworker/chromium/register-different-script-many-times.html [ Slow ]
-crbug.com/514600 [ Release Win7 ] http/tests/fetch/workers/fetch-access-control-cookie-nocors-base-https-other-https.html [ Slow ]
-crbug.com/514600 [ Release Win7 ] http/tests/fetch/workers/fetch-access-control-cookie-nocors-other-https.html [ Slow ]
-crbug.com/514600 [ Release Win7 ] http/tests/fetch/workers/fetch-access-control-cookie.html [ Slow ]
-crbug.com/514600 [ Release Win7 ] http/tests/fetch/workers/fetch-access-control-cors-base-https-other-https.html [ Slow ]
-crbug.com/514600 [ Release Win7 ] http/tests/fetch/workers/fetch-access-control-cors-preflight-base-https-other-https.html [ Slow ]
-crbug.com/514600 [ Release Win7 ] http/tests/fetch/workers/fetch-access-control-cors-preflight-other-https.html [ Slow ]
-crbug.com/514600 [ Release Win7 ] http/tests/fetch/workers/fetch-access-control-cors-preflight.html [ Slow ]
-crbug.com/514600 [ Release Win7 ] http/tests/fetch/workers/fetch-access-control-cors-preflight2-base-https-other-https.html [ Slow ]
-crbug.com/514600 [ Release Win7 ] http/tests/fetch/workers/fetch-access-control-cors-preflight2-other-https.html [ Slow ]
-crbug.com/514600 [ Release Win7 ] http/tests/fetch/workers/fetch-access-control-cors-preflight2.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-auth.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-auth-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-auth-base-https-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-auth-nocors.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-auth-nocors-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-auth-nocors-base-https-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-base-https-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cookie-base-https-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cookie.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cookie-nocors-base-https-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cookie-nocors.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cookie-nocors-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cookie-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cors-base-https-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cors.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cors-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cors-preflight2-base-https-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cors-preflight2.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cors-preflight2-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cors-preflight-base-https-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cors-preflight.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-cors-preflight-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-nocors-base-https-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-nocors.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-nocors-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect-base-https-other-https.html [ Slow ]
-crbug.com/458491 [ Win ] http/tests/fetch/serviceworker-proxied/fetch-access-control-redirect-credentials-base-https-other-https.html [ Slow ]
-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/516319 [ Win ] http/tests/fetch/ [ Slow ]
 
 # Most crypto/subtle tests are slow some or most of the time.
 crbug.com/459009 crypto/subtle/ [ Slow ]
 
 crbug.com/24182 [ Debug ] animations/interpolation/transform-interpolation.html [ Slow ]
 crbug.com/24182 [ Debug ] animations/interpolation/webkit-transform-interpolation.html [ Slow ]
 
 crbug.com/508984 http/tests/cachestorage/serviceworker/cache-match.html [ Slow ]
 crbug.com/508984 http/tests/cachestorage/worker/cache-match.html [ Slow ]
 crbug.com/508984 http/tests/cachestorage/window/cache-match.html [ Slow ]