Gardening: Revise service worker bug links and expectations.

TBR=horo

Bug: 735883
Change-Id: Ia974a3c566c677d3f5bfdaedee5ef5a53397f6fb
Reviewed-on: https://chromium-review.googlesource.com/544728Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Tim 'mithro' Ansell <tansell@chromium.org>
Reviewed-by: Tsuyoshi Horo <horo@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#481817}

third_party/WebKit/LayoutTests/TestExpectations

@@ -2466,10 +2466,10 @@ crbug.com/595993 virtual/off-main-thread-fetch/external/wpt/service-workers/serv
 crbug.com/595993 external/wpt/service-workers/service-worker/request-end-to-end.https.html [ Failure ]
 crbug.com/595993 virtual/off-main-thread-fetch/external/wpt/service-workers/service-worker/request-end-to-end.https.html [ Failure ]
 
-crbug.com/595993 external/wpt/service-workers/service-worker/fetch-canvas-tainting.https.html [ Skip ]
-crbug.com/595993 virtual/off-main-thread-fetch/external/wpt/service-workers/service-worker/fetch-canvas-tainting.https.html [ Skip ]
-
-crbug.com/735883 [ Win10 ] external/wpt/service-workers/service-worker/fetch-canvas-tainting-cache.https.html [ Pass Failure ]
+crbug.com/735883 external/wpt/service-workers/service-worker/fetch-canvas-tainting.https.html [ Pass Failure ]
+crbug.com/735883 virtual/off-main-thread-fetch/external/wpt/service-workers/service-worker/fetch-canvas-tainting.https.html [ Pass Failure ]
+crbug.com/735883 external/wpt/service-workers/service-worker/fetch-canvas-tainting-cache.https.html [ Pass Failure ]
+crbug.com/735883 virtual/off-main-thread-fetch/external/wpt/service-workers/service-worker/fetch-canvas-tainting-cache.https.html [ Pass Failure ]
 
 crbug.com/619427 [ Mac Linux ] fast/overflow/overflow-height-float-not-removed-crash3.html [ Pass Failure ]