TestExpecations: LayoutTest virtual/gpu/compositedscrolling/overflow/overflow-positioning.html image failure on Linux

BUG=247982
TBR=danakj

Review URL: https://codereview.chromium.org/23546004

git-svn-id: svn://svn.chromium.org/blink/trunk@156929 bbb929c8-8fbe-4397-9dbb-9b2b20218538
diff --git a/third_party/WebKit/LayoutTests/TestExpectations b/third_party/WebKit/LayoutTests/TestExpectations
index ca795d9..e9324ae 100644
--- a/third_party/WebKit/LayoutTests/TestExpectations
+++ b/third_party/WebKit/LayoutTests/TestExpectations
@@ -1165,7 +1165,7 @@
 crbug.com/247979 [ Win7 Debug ] inspector/elements/edit-dom-actions.html [ Timeout ]
 crbug.com/247979 [ Mac Linux Debug ] inspector/elements/edit-dom-actions.html [ Pass Timeout ]
 crbug.com/247981 [ Win Debug ] inspector/profiler/heap-snapshot-get-profile-crash.html [ Pass Crash ]
-crbug.com/247982 [ Mac Debug ] virtual/gpu/compositedscrolling/overflow/overflow-positioning.html [ ImageOnlyFailure Pass ]
+crbug.com/247982 [ Linux Mac Debug ] virtual/gpu/compositedscrolling/overflow/overflow-positioning.html [ ImageOnlyFailure Pass ]
 crbug.com/247982 [ Win ] virtual/gpu/compositedscrolling/overflow/overflow-positioning.html [ ImageOnlyFailure Pass ]
 crbug.com/248063 plugins/plugin-clip-subframe.html [ Pass Failure ]
 crbug.com/248065 [ Linux ] svg/text/foreignObject-text-clipping-bug.xml [ Pass ImageOnlyFailure ]