Add atomic sequence number to ChannelIDService and check that in URLRequestHttpJob logging

net/ssl/channel_id_service.cc

Index: net/ssl/channel_id_service.cc
diff --git a/net/ssl/channel_id_service.cc b/net/ssl/channel_id_service.cc
index e17b813cd7334d8baba18582cb941e5f28445e5a..814ee89ce0037b38ffc2d8a3582fc19b4bca7b47 100644
--- a/net/ssl/channel_id_service.cc
+++ b/net/ssl/channel_id_service.cc
@@ -8,6 +8,7 @@
 #include <limits>
 #include <utility>
 
+#include "base/atomic_sequence_num.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback_helpers.h"
@@ -38,6 +39,8 @@ namespace net {
 
 namespace {
 
+base::StaticAtomicSequenceNumber g_next_id;
+
 // Used by the GetDomainBoundCertResult histogram to record the final
 // outcome of each GetChannelID or GetOrCreateChannelID call.
 // Do not re-use values.
@@ -293,6 +296,7 @@ ChannelIDService::ChannelIDService(
       inflight_joins_(0),
       workers_created_(0),
       weak_ptr_factory_(this) {
+  id_ = g_next_id.GetNext();
 }
 
 ChannelIDService::~ChannelIDService() {