[Chromoting] Use ProcessStatsSender in host process

remoting/host/process_stats_sender.cc

Index: remoting/host/process_stats_sender.cc
diff --git a/remoting/host/process_stats_sender.cc b/remoting/host/process_stats_sender.cc
index a734877e51887d5c92d33ab8f1686f94ad2db2dd..2bfd4c2186f1045f4536585097d9d7af0b943cec 100644
--- a/remoting/host/process_stats_sender.cc
+++ b/remoting/host/process_stats_sender.cc
@@ -13,16 +13,31 @@
 
 namespace remoting {
 
+namespace {
+
+std::vector<ProcessStatsAgent*> RemoveNullAgent(
+    std::initializer_list<ProcessStatsAgent*> agents) {
+  std::vector<ProcessStatsAgent*> result;
+  for (auto* const agent : agents) {
+    if (agent) {
+      result.push_back(agent);
+    }
+  }
+  return result;
+}
+
+}  // namespace
+
 ProcessStatsSender::ProcessStatsSender(
     protocol::ProcessStatsStub* host_stats_stub,
     base::TimeDelta interval,
     std::initializer_list<ProcessStatsAgent*> agents)
     : host_stats_stub_(host_stats_stub),
-      agents_(agents),
+      agents_(RemoveNullAgent(agents)),
       thread_checker_() {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(host_stats_stub_);
-  DCHECK(!interval.is_zero());
+  DCHECK(interval > base::TimeDelta());
   DCHECK(!agents_.empty());
 
   timer_.Start(FROM_HERE, interval, this, &ProcessStatsSender::ReportUsage);