Disable OSMetricsTest.TestMachOReading.

Disabling the test as it very occasionally fails.

Bug: 852690
Change-Id: I17164a945d1ae99b3af9245af743af695d6737dc
TBR: primiano@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1100822Reviewed-by: Ramin Halavati <rhalavati@chromium.org>
Commit-Queue: Ramin Halavati <rhalavati@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567224}

services/resource_coordinator/public/cpp/memory_instrumentation/os_metrics_unittest.cc

@@ -284,7 +284,8 @@ void CheckMachORegions(const std::vector<mojom::VmRegionPtr>& maps) {
 
 }  // namespace
 
-TEST(OSMetricsTest, TestMachOReading) {
+// Test failing on Mac ASan 64: https://crbug.com/852690
+TEST(OSMetricsTest, DISABLED_TestMachOReading) {
   auto maps = OSMetrics::GetProcessMemoryMaps(base::kNullProcessId);
   CheckMachORegions(maps);
   maps = OSMetrics::GetProcessModules(base::kNullProcessId);