Deprecate NonThreadSafe in net/ in favor of SequenceChecker/ThreadChecker.

net/proxy/proxy_resolver_v8_tracing.cc

Index: net/proxy/proxy_resolver_v8_tracing.cc
diff --git a/net/proxy/proxy_resolver_v8_tracing.cc b/net/proxy/proxy_resolver_v8_tracing.cc
index 1019e841da718142edd14b4d2492c327dab24d5e..fc78c9788bf87786c2b05b703b722fcd8aec25d4 100644
--- a/net/proxy/proxy_resolver_v8_tracing.cc
+++ b/net/proxy/proxy_resolver_v8_tracing.cc
@@ -12,6 +12,7 @@
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
+#include "base/sequence_checker.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/cancellation_flag.h"
@@ -302,8 +303,7 @@ class Job : public base::RefCountedThreadSafe<Job>,
   AddressList pending_dns_addresses_;
 };
 
-class ProxyResolverV8TracingImpl : public ProxyResolverV8Tracing,
-                                   public base::NonThreadSafe {
+class ProxyResolverV8TracingImpl : public ProxyResolverV8Tracing {
  public:
   ProxyResolverV8TracingImpl(std::unique_ptr<base::Thread> thread,
                              std::unique_ptr<ProxyResolverV8> resolver,
@@ -338,6 +338,8 @@ class ProxyResolverV8TracingImpl : public ProxyResolverV8Tracing,
   // The number of outstanding (non-cancelled) jobs.
   int num_outstanding_callbacks_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(ProxyResolverV8TracingImpl);
 };
 
@@ -942,6 +944,7 @@ ProxyResolverV8TracingImpl::ProxyResolverV8TracingImpl(
 }
 
 ProxyResolverV8TracingImpl::~ProxyResolverV8TracingImpl() {
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   // Note, all requests should have been cancelled.
   CHECK_EQ(0, num_outstanding_callbacks_);
 
@@ -967,7 +970,7 @@ void ProxyResolverV8TracingImpl::GetProxyForURL(
     const CompletionCallback& callback,
     std::unique_ptr<ProxyResolver::Request>* request,
     std::unique_ptr<Bindings> bindings) {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   DCHECK(!callback.is_null());
 
   scoped_refptr<Job> job = new Job(job_params_.get(), std::move(bindings));