Never fix fast/table/backgr_border-table-column-group-collapsed-border.html on Win7 Debug

The test procudes a few invisible different pixels.

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Bug: 728895
Change-Id: I9a0cae6ca658d1d7100506b088e42032f4abc9fb
Reviewed-on: https://chromium-review.googlesource.com/522386
Reviewed-by: Xianzhu Wang <[email protected]>
Commit-Queue: Xianzhu Wang <[email protected]>
Cr-Commit-Position: refs/heads/master@{#476591}
diff --git a/third_party/WebKit/LayoutTests/NeverFixTests b/third_party/WebKit/LayoutTests/NeverFixTests
index 0e56f9c..422fcebd 100644
--- a/third_party/WebKit/LayoutTests/NeverFixTests
+++ b/third_party/WebKit/LayoutTests/NeverFixTests
@@ -758,3 +758,8 @@
 # run-webkit-tests; see https://crbug.com/359838.
 http/tests/ManualTests/ [ WontFix ]
 virtual/mojo-loading/http/tests/ManualTests/ [ WontFix ]
+
+# These test produce invisible different pixels on Win7 Debug.
+[ Win7 Debug ] fast/table/backgr_border-table-column-group-collapsed-border.html [ WontFix ]
+[ Win7 Debug ] virtual/mojo-loading/fast/table/backgr_border-table-column-group-collapsed-border.html [ WontFix ]
+