Simplify ImageDocument checkerboard background styling

third_party/WebKit/LayoutTests/TestExpectations

 # Intentional failures to test the layout test system.
 Bug(intentional) [ Android Linux Win Mac10.10 Mac10.11 Retina ] harness-tests/crash.html [ Crash ]
 crbug.com/644303 [ Mac10.9 ] harness-tests/crash.html [ Crash Timeout ]
 Bug(intentional) harness-tests/timeout.html [ Timeout ]
 
 # ====== Oilpan-only failures from here ======
 # Most of these actually cause the tests to report success, rather than
 # failure. Expected outputs will be adjusted for the better once Oilpan
 # has been well and truly enabled always.
 
@@ skipping 1393 matching lines @@
 
 # This test breaks when the feature introduced in the bug is enabled. We keep
 # this tested without the feature by using the virtual test. See
 # virtual/stable/http/tests/navigation/beacon-cross-origin-redirect-blob-expected.txt
 crbug.com/490015 http/tests/navigation/beacon-cross-origin-redirect-blob.html [ Skip ]
 # This test doesn't need to be run with the stable release mode.
 crbug.com/490015 virtual/stable/http/tests/navigation/beacon-blob-with-non-simple-type.html [ Skip ]
 # This test fails with the stable release mode.
 crbug.com/490015 virtual/stable/http/tests/navigation/same-and-different-back.html [ Skip ]
 
+# https://codereview.chromium.org/2523513002/
+crbug.com/650455 images/exif-orientation-height-image-document.html [ NeedsRebaseline ]
+crbug.com/650455 images/huge-image-viewport-scale.html [ NeedsRebaseline ]
+crbug.com/650455 mhtml/image_document.mht [ NeedsRebaseline ]
+crbug.com/650455 mhtml/invalid-bad-boundary2.mht [ NeedsRebaseline ]
+crbug.com/650455 virtual/gpu-rasterization/images/exif-orientation-height-image-document.html [ NeedsRebaseline ]
+crbug.com/650455 virtual/gpu-rasterization/images/huge-image-viewport-scale.html [ NeedsRebaseline ]
+
 # These tests have different baselines on Linux Precise than Linux Trusty;
 # Linux Precise is being phased out, so until it's phased out, any tests
 # that have baselines that behave differently can be disabled.
 crbug.com/518929 [ Precise ] http/tests/appcache/obsolete-error-events.html [ Skip ]
 crbug.com/660580 [ Precise ] compositing/overflow/do-not-repaint-if-scrolling-composited-layers.html [ Skip ]
 crbug.com/660580 [ Precise ] fast/borders/border-antialiasing.html [ Skip ]
 crbug.com/660580 [ Precise ] fast/canvas/canvas-composite-video-shadow.html [ Skip ]
 crbug.com/660580 [ Precise ] fast/text/complex-text-opacity.html [ Skip ]
 crbug.com/660580 [ Precise ] fast/text/font-fallback.html [ Skip ]
 crbug.com/660580 [ Precise ] fast/text/international/complex-character-based-fallback.html [ Skip ]
@@ skipping 274 matching lines @@
 crbug.com/595993 imported/wpt/service-workers/service-worker/fetch-header-visibility.https.html [ Failure ]
 crbug.com/595993 imported/wpt/service-workers/service-worker/request-end-to-end.https.html [ Failure ]
 
 # Flaky failures (text diff).
 crbug.com/666602 inspector-enabled/sources/debugger/script-formatter-breakpoints-1.html [ Failure ]
 
 # TODO(mgiuca): This was previously marked as [ NeedsRebaseline ] for [ Precise ] only.
 crbug.com/666628 [ Mac Win Trusty ] http/tests/inspector-enabled/console-stack-overflow-source-url.html [ NeedsRebaseline ]
 
 crbug.com/619427 [ Linux ] fast/overflow/overflow-height-float-not-removed-crash3.html [ Pass Failure ]