profiler: fix ThreadProfilerPlatformConfigurationTest.IsSupported on Mac11

The sampling profiler isn't supported on macOS 11.0 because of the
new dyld shared cache; have the test check that it is disabled.

Bug: 1101399
Change-Id: I312a31d2bc2df3b1e5b6e9da675b11069cca4aef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2643408Reviewed-by: Mike Wittman <wittman@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#846127}

chrome/common/profiler/thread_profiler_platform_configuration_unittest.cc

@@ -12,6 +12,10 @@
 #include "components/version_info/version_info.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+#if defined(OS_MAC)
+#include "base/mac/mac_util.h"
+#endif
+
 #if (defined(OS_WIN) && defined(ARCH_CPU_X86_64)) || \
     (defined(OS_MAC) && defined(ARCH_CPU_X86_64)) || \
     (defined(OS_ANDROID) && BUILDFLAG(ENABLE_ARM_CFI_TABLE))
@@ -79,9 +83,18 @@ TEST_F(ThreadProfilerPlatformConfigurationTest, IsSupported) {
 
   EXPECT_FALSE(config()->IsSupported(base::nullopt));
 #else
+#if defined(OS_MAC)
+  // Sampling profiler does not work on macOS 11.0 yet:
+  // https://crbug.com/1101399
+  const bool on_canary = base::mac::IsAtMostOS10_15();
+  const bool on_dev = base::mac::IsAtMostOS10_15();
+#else
+  const bool on_canary = true;
+  const bool on_dev = true;
+#endif
   EXPECT_FALSE(config()->IsSupported(version_info::Channel::UNKNOWN));
-  EXPECT_TRUE(config()->IsSupported(version_info::Channel::CANARY));
-  EXPECT_TRUE(config()->IsSupported(version_info::Channel::DEV));
+  EXPECT_EQ(on_canary, config()->IsSupported(version_info::Channel::CANARY));
+  EXPECT_EQ(on_dev, config()->IsSupported(version_info::Channel::DEV));
   EXPECT_FALSE(config()->IsSupported(version_info::Channel::BETA));
   EXPECT_FALSE(config()->IsSupported(version_info::Channel::STABLE));