profiler: fix ThreadProfilerPlatformConfigurationTest.IsSupported better

I missed one part of the test in r846127.

Bug: 1101339
Change-Id: I2e0cdc56c31800577baecf2e10cb233ab7311099
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2645205Reviewed-by: Mike Wittman <wittman@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#846246}

chrome/common/profiler/thread_profiler_platform_configuration_unittest.cc

@@ -88,9 +88,11 @@ TEST_F(ThreadProfilerPlatformConfigurationTest, IsSupported) {
   // https://crbug.com/1101399
   const bool on_canary = base::mac::IsAtMostOS10_15();
   const bool on_dev = base::mac::IsAtMostOS10_15();
+  const bool on_default = base::mac::IsAtMostOS10_15();
 #else
   const bool on_canary = true;
   const bool on_dev = true;
+  const bool on_default = true;
 #endif
   EXPECT_FALSE(config()->IsSupported(version_info::Channel::UNKNOWN));
   EXPECT_EQ(on_canary, config()->IsSupported(version_info::Channel::CANARY));
@@ -98,7 +100,7 @@ TEST_F(ThreadProfilerPlatformConfigurationTest, IsSupported) {
   EXPECT_FALSE(config()->IsSupported(version_info::Channel::BETA));
   EXPECT_FALSE(config()->IsSupported(version_info::Channel::STABLE));
 
-  EXPECT_TRUE(config()->IsSupported(base::nullopt));
+  EXPECT_EQ(on_default, config()->IsSupported(base::nullopt));
 #endif
 }