[NOT FOR REVIEW] Instrument net/ with trace events.

net/cert/multi_threaded_cert_verifier.cc

Index: net/cert/multi_threaded_cert_verifier.cc
diff --git a/net/cert/multi_threaded_cert_verifier.cc b/net/cert/multi_threaded_cert_verifier.cc
index 714b291b2bb0ba10e7b815dea899243b0dbaf236..c85c5d6ea1e9c9f61ae7456b6e82be9b9f43acd4 100644
--- a/net/cert/multi_threaded_cert_verifier.cc
+++ b/net/cert/multi_threaded_cert_verifier.cc
@@ -29,6 +29,8 @@
 #include "net/cert/x509_certificate_net_log_param.h"
 #include "net/log/net_log.h"
 
+#include "base/trace_event/trace_event.h"
+
 #if defined(USE_NSS_CERTS) || defined(OS_IOS)
 #include <private/pprthred.h>  // PR_DetachThread
 #endif
@@ -234,6 +236,7 @@ void DoVerifyOnWorkerThread(const scoped_refptr<CertVerifyProc>& verify_proc,
                             const CertificateList& additional_trust_anchors,
                             int* error,
                             CertVerifyResult* result) {
+  TRACE_EVENT0("net", "net::DoVerifyOnWorkerThread");
   *error = verify_proc->Verify(cert.get(), hostname, ocsp_response, flags,
                                crl_set.get(), additional_trust_anchors, result);
 
@@ -359,6 +362,7 @@ class CertVerifierJob {
 
   void OnJobCompleted(
       scoped_ptr<MultiThreadedCertVerifier::CachedResult> verify_result) {
+    TRACE_EVENT0("net", "net::CertVerifierJob::OnJobCompleted");
     scoped_ptr<CertVerifierJob> keep_alive = cert_verifier_->RemoveJob(this);
 
     LogMetrics(*verify_result);