Use TaskScheduler instead of WorkerPool in multi_threaded_cert_verifier.cc.

net/cert/multi_threaded_cert_verifier_unittest.cc

Index: net/cert/multi_threaded_cert_verifier_unittest.cc
diff --git a/net/cert/multi_threaded_cert_verifier_unittest.cc b/net/cert/multi_threaded_cert_verifier_unittest.cc
index aecbb51de085f33c207ed37ce98f648364f2c70e..e3097daba9aeb9c9234a2fe8ed511e61463518f2 100644
--- a/net/cert/multi_threaded_cert_verifier_unittest.cc
+++ b/net/cert/multi_threaded_cert_verifier_unittest.cc
@@ -10,6 +10,8 @@
 #include "base/debug/leak_annotations.h"
 #include "base/files/file_path.h"
 #include "base/format_macros.h"
+#include "base/message_loop/message_loop.h"
+#include "base/test/scoped_task_scheduler.h"
 #include "net/base/net_errors.h"
 #include "net/base/test_completion_callback.h"
 #include "net/cert/cert_verify_proc.h"
@@ -62,11 +64,16 @@ class MockCertVerifyProc : public CertVerifyProc {
 
 class MultiThreadedCertVerifierTest : public ::testing::Test {
  public:
-  MultiThreadedCertVerifierTest() : verifier_(new MockCertVerifyProc()) {}
+  MultiThreadedCertVerifierTest()
+      : verifier_(new MockCertVerifyProc()),
+        scoped_task_scheduler_(base::MessageLoop::current()) {}
   ~MultiThreadedCertVerifierTest() override {}
 
  protected:
   MultiThreadedCertVerifier verifier_;
+
+ private:
+  base::test::ScopedTaskScheduler scoped_task_scheduler_;
 };
 
 // Tests an inflight join.