sheriff: Disable MANUAL_SamplerMicroBenchmark on Mac

TBR=alph@chromium.org

Bug: 1117342
Change-Id: I6c9f8be480cebc1d74e396f17fbe993fbe2d681a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2359953Reviewed-by: Fergus Dall <sidereal@google.com>
Commit-Queue: Fergus Dall <sidereal@google.com>
Cr-Commit-Position: refs/heads/master@{#799004}

base/sampling_heap_profiler/sampling_heap_profiler_unittest.cc

@@ -222,7 +222,13 @@ TEST_F(SamplingHeapProfilerTest, DISABLED_SequentialLargeSmallStats) {
 
 // Platform TLS: alloc+free[ns]: 22.184  alloc[ns]: 8.910  free[ns]: 13.274
 // thread_local: alloc+free[ns]: 18.353  alloc[ns]: 5.021  free[ns]: 13.331
-TEST_F(SamplingHeapProfilerTest, MANUAL_SamplerMicroBenchmark) {
+// TODO(crbug.com/1117342) Disabled on Mac
+#if defined(OS_MAC)
+#define MAYBE_MANUAL_SamplerMicroBenchmark DISABLED_MANUAL_SamplerMicroBenchmark
+#else
+#define MAYBE_MANUAL_SamplerMicroBenchmark MANUAL_SamplerMicroBenchmark
+#endif
+TEST_F(SamplingHeapProfilerTest, MAYBE_MANUAL_SamplerMicroBenchmark) {
   // With the sampling interval of 100KB it happens to record ~ every 450th
   // allocation in the browser process. We model this pattern here.
   constexpr size_t sampling_interval = 100000;