[benchmarking] disabling...

[benchmarking] disabling blink_perf.canvas/draw-static-canvas-2d-to-hw-accelerated-canvas-2d_RAF.html?RAF for mac-10.12

We're seeing infra failures on mac-10.12 on waterfall. Both build 5800
and 5808 are failed by the same issue on the following story:
blink_perf.canvas/draw-static-canvas-2d-to-hw-accelerated-canvas-2d_RAF.html?RAF

We need to disable it for now to keep waterfall running.

NOTRY=true

Bug: chromium:1036446
Change-Id: If8b234f6bb1d82ff15a702c1f481e40e7d7c5504
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1979266Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Commit-Queue: Caleb Rouleau <crouleau@chromium.org>
Commit-Queue: Wenbin Zhang <wenbinzhang@google.com>
Cr-Commit-Position: refs/heads/master@{#726909}

tools/perf/expectations.config

@@ -61,6 +61,7 @@ crbug.com/994912 [ android-webview ] blink_perf.canvas/transferFromImageBitmap.h
 crbug.com/1013618 [ android ] blink_perf.canvas/putImageData.html [ Skip ]
 crbug.com/1013618 [ android ] blink_perf.canvas/putImageData_RAF.html?RAF [ Skip ]
 crbug.com/1035865 [ android-pixel-2 android-webview ] blink_perf.canvas/draw-dynamic-webgl-to-hw-accelerated-canvas-2d_RAF.html?RAF [ Skip ]
+crbug.com/1036446 [ mac-10.12 ] blink_perf.canvas/draw-static-canvas-2d-to-hw-accelerated-canvas-2d_RAF.html?RAF [ Skip ]
 
 # Benchmark: blink_perf.css
 crbug.com/891878 [ android-nexus-5x android-webview ] blink_perf.css/CustomPropertiesVarAlias.html [ Skip ]