Mark http/tests/devtools/screen-orientation-override.js flaky

TBR=odejesush@chromium.org
NOTRY=true

Bug: 1047760
Change-Id: Idcca8c22fcb2133b4553dbbbd9258fa8a3af0ff9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2033433Reviewed-by: Xida Chen <xidachen@chromium.org>
Commit-Queue: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737393}

third_party/blink/web_tests/TestExpectations

@@ -6542,3 +6542,6 @@ crbug.com/1047420 [ Mac ] http/tests/devtools/persistence/persistence-move-break
 
 # Color difference on MacOS 10.14
 crbug.com/1047126 [ Mac10.14 ] external/wpt/css/css-color/color-initial-canvastext.html [ Failure ]
+
+# Sheriff 2020-01-31
+crbug.com/1047760 [ Win ] http/tests/devtools/screen-orientation-override.js [ Pass Timeout ]