Mark flaky webkit_layout_tests on Mac.

TBR=yosin@chromium.org

Bug: 909694
Change-Id: Ie6fd36ef024ce524152d5b718fbbc848b1735f05
Reviewed-on: https://chromium-review.googlesource.com/c/1353958
Commit-Queue: Tim Schumann <tschumann@chromium.org>
Reviewed-by: Tim Schumann <tschumann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611680}

third_party/blink/web_tests/TestExpectations

@@ -230,7 +230,7 @@ crbug.com/605812 [ Mac ] virtual/spv2/fast/overflow/overflow-height-float-not-re
 crbug.com/605812 [ Mac ] virtual/spv2/fast/overflow/overflow-height-float-not-removed-crash2.html [ Skip ]
 crbug.com/619427 [ Mac ] virtual/spv2/fast/overflow/overflow-height-float-not-removed-crash3.html [ Pass Failure ]
 crbug.com/619427 [ Linux ] virtual/spv2/fast/overflow/overflow-height-float-not-removed-crash3.html [ Pass Failure ]
-# --- End SPV2 Tests ---
+# --- End SPV2 Tests --
 
 # Slimming paint V1.75
 # Subpixel differences
@@ -460,6 +460,13 @@ crbug.com/722825 virtual/new-remote-playback-pipeline/media/controls/video-enter
 crbug.com/722825 virtual/video-surface-layer/media/controls/video-enter-exit-fullscreen-while-hovering-shows-controls.html [ Timeout Pass ]
 crbug.com/876050 virtual/video-surface-layer/media/controls/text-track-menu-pointer-selection.html [ Pass Failure ]
 
+crbug.com/909694 [ Mac ] fast/forms/color/color-suggestion-picker-appearance-zoom200.html [ Failure Pass ]
+crbug.com/909694 [ Mac ] fast/forms/select/select-popup-pagekeys.html  [ Failure Pass ]
+crbug.com/909694 [ Mac ] fast/forms/textarea/textarea-metrics.html  [ Failure Pass ]
+crbug.com/909694 [ Mac ] svg/zoom/page/zoom-zoom-coords.xhtml  [ Failure Pass ]
+crbug.com/909694 [ Mac ] virtual/mouseevent_fractional/fast/events/hit-test-clip-path-reference.html  [ Failure Pass ]
+crbug.com/909694 [ Mac ] virtual/user-activation-v2/fast/events/hit-test-clip-path-reference.html [ Failure Pass ]
+
 #### crbug.com/783229 overflow
 crbug.com/724701 overflow/overflow-basic-004.html [ Failure ]