Add a buildflag to use the handle verifier in a per module mode.

base/win/scoped_handle_unittest.cc

Index: base/win/scoped_handle_unittest.cc
diff --git a/base/win/scoped_handle_unittest.cc b/base/win/scoped_handle_unittest.cc
index 2d90f9fcf34f693552ffcc62ba31111520d3a393..5cb1748549793f688a3520f727314732a4a74edc 100644
--- a/base/win/scoped_handle_unittest.cc
+++ b/base/win/scoped_handle_unittest.cc
@@ -48,6 +48,7 @@ TEST(ScopedHandleTest, ScopedHandle) {
   EXPECT_EQ(magic_error, ::GetLastError());
 }
 
+#if BUILDFLAG(ENABLE_HANDLE_VERIFIER)
 TEST(ScopedHandleTest, ActiveVerifierTrackedHasBeenClosed) {
   HANDLE handle = ::CreateMutex(nullptr, false, nullptr);
   ASSERT_NE(HANDLE(nullptr), handle);
@@ -129,6 +130,7 @@ MULTIPROCESS_TEST_MAIN(ActiveVerifierChildProcess) {
 
   return 0;
 }
+#endif
 
 }  // namespace win
 }  // namespace base